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exponential and logarithmic functions worksheet with answers pdf: Precalculus Jay P. Abramson, Valeree Falduto, Rachael Gross (Mathematics teacher), David Lippman, Melonie Rasmussen, Rick Norwood, Nicholas Belloit, Jean-Marie Magnier, Harold Whipple, Christina Fernandez, 2014-10-23 Precalculus is intended for college-level precalculus students. Since precalculus courses vary from one institution to the next, we have attempted to meet the needs of as broad an audience as possible, including all of the content that might be covered in any particular course. The result is a comprehensive book that covers more ground than an instructor could likely cover in a typical one- or two-semester course; but instructors should find, almost without fail, that the topics they wish to include in their syllabus are covered in the text. Many chapters of OpenStax College Precalculus are suitable for other freshman and sophomore math courses such as College Algebra and Trigonometry; however, instructors of those courses might need to supplement or adjust the material. OpenStax will also be releasing College Algebra and Algebra and trigonometry titles tailored to the particular scope, sequence, and pedagogy of those courses.--Preface. |
exponential and logarithmic functions worksheet with answers pdf: College Algebra Jay Abramson, 2018-01-07 College Algebra provides a comprehensive exploration of algebraic principles and meets scope and sequence requirements for a typical introductory algebra course. The modular approach and richness of content ensure that the book meets the needs of a variety of courses. College Algebra offers a wealth of examples with detailed, conceptual explanations, building a strong foundation in the material before asking students to apply what they've learned. Coverage and Scope In determining the concepts, skills, and topics to cover, we engaged dozens of highly experienced instructors with a range of student audiences. The resulting scope and sequence proceeds logically while allowing for a significant amount of flexibility in instruction. Chapters 1 and 2 provide both a review and foundation for study of Functions that begins in Chapter 3. The authors recognize that while some institutions may find this material a prerequisite, other institutions have told us that they have a cohort that need the prerequisite skills built into the course. Chapter 1: Prerequisites Chapter 2: Equations and Inequalities Chapters 3-6: The Algebraic Functions Chapter 3: Functions Chapter 4: Linear Functions Chapter 5: Polynomial and Rational Functions Chapter 6: Exponential and Logarithm Functions Chapters 7-9: Further Study in College Algebra Chapter 7: Systems of Equations and Inequalities Chapter 8: Analytic Geometry Chapter 9: Sequences, Probability and Counting Theory |
exponential and logarithmic functions worksheet with answers pdf: Beginning and Intermediate Algebra Tyler Wallace, 2018-02-13 Get Better Results with high quality content, exercise sets, and step-by-step pedagogy! Tyler Wallace continues to offer an enlightened approach grounded in the fundamentals of classroom experience in Beginning and Intermediate Algebra. The text reflects the compassion and insight of its experienced author with features developed to address the specific needs of developmental level students. Throughout the text, the author communicates to students the very points their instructors are likely to make during lecture, and this helps to reinforce the concepts and provide instruction that leads students to mastery and success. The exercises, along with the number of practice problems and group activities available, permit instructors to choose from a wealth of problems, allowing ample opportunity for students to practice what they learn in lecture to hone their skills. In this way, the book perfectly complements any learning platform, whether traditional lecture or distance-learning; its instruction is so reflective of what comes from lecture, that students will feel as comfortable outside of class as they do inside class with their instructor. |
exponential and logarithmic functions worksheet with answers pdf: Mathematics Standard Level for IB Diploma Exam Preparation Guide Paul Fannon, Vesna Kadelburg, Ben Woolley, Stephen Ward, 2014-03-27 A new series of Exam Preparation guides for the IB Diploma Mathematics HL and SL and Mathematical Studies. This exam preparation guide for the IB Diploma Mathematics Standard Level course breaks the course down into chapters that summarise material and present revision questions by exam question type, so that revision can be highly focused to make best use of students' time. Students can stretch themselves to achieve their best with 'going for the top' questions for those who want to achieve the highest results. Worked solutions for all the mixed and 'going for the top' questions are included, plus exam hints throughout. Guides for Mathematics Higher Level and Mathematical Studies are also available. |
exponential and logarithmic functions worksheet with answers pdf: Modeling with Logarithms Jack Burrill, Miriam Clifford, James M. Landwehr, 1999 |
exponential and logarithmic functions worksheet with answers pdf: Intermediate Algebra 2e Lynn Marecek, MaryAnne Anthony-Smith, Andrea Honeycutt Mathis, 2020-05-06 |
exponential and logarithmic functions worksheet with answers pdf: Puzzling Algebra Steve Hiner, 2014-09-06 This book was written to provide math teachers with supplemental resources they can use in their classrooms. This book can also be used by students to improve their skills. Tutorials are included with many of the activities so you can learn at your own pace. Topics can be used for Alg 1 and 2, as well as Integrated Math I, II, and III. Topics include: order of operations, solving many types of equations, exponents, mult/divide scientific notation, percentages, distance formula, Pythagorean Theorem, area of triangles from determinants, basic circles, square roots, mean, median, mode, geometric mean, box and whisker plots, matrices (cryptography and inverses), plotting points, graphing circles, lines, and parabolas, long and synthetic division of polynomials, FOIL, Quadratic Formula, logarithms, factoring, and the Binary number system. |
exponential and logarithmic functions worksheet with answers pdf: Precalculus Michael Sullivan, 2018-01-11 NOTE: Before purchasing, check with your instructor to ensure you select the correct ISBN. Several versions of the MyLab(tm)and Mastering(tm) platforms exist for each title, and registrations are not transferable. To register for and use MyLab or Mastering, you may also need a Course ID, which your instructor will provide. Used books, rentals, and purchases made outside of Pearson If purchasing or renting from companies other than Pearson, the access codes for the MyLab platform may not be included, may be incorrect, or may be previously redeemed. Check with the seller before completing your purchase. For courses in precalculus. Ties concepts together using a functions approach The Concepts Through Functions Series introduces functions at the start of each text, and maintains a continuous theme by introducing/developing a new function in every chapter. Known for their ability to connect with today's students, acclaimed authors Sullivan and Sullivan focus on the fundamentals - preparing for class, practice with homework, and reviewing key concepts - encouraging students to master basic skills and develop the conceptual understanding needed for this and future courses. Graphing utility coverage is optional, and can be included at the discretion of each instructor based on course needs. Also available with MyLab Math MyLab(tm) Math is the teaching and learning platform that empowers instructors to reach every student. By combining trusted author content with digital tools and a flexible platform, MyLab personalizes the learning experience and improves results for each student. Note: You are purchasing a standalone product; MyLab Math does not come packaged with this content. Students, if interested in purchasing this title with MyLab Math, ask your instructor to confirm the correct package ISBN and Course ID. Instructors, contact your Pearson representative for more information. If you would like to purchase both the physical text and MyLab Math, search for: 0134859030 / 9780134859033 Precalculus: Concepts Through Functions, A Right Triangle Approach to Trigonometry Plus MyLab Math with eText -- Title-Specific Access Card Package, 4/e Package consists of: 0134686985 / 9780134686981 Precalculus: Concepts Through Functions, A Right Triangle Approach to Trigonometry 0134852184 / 9780134852188 MyLab Math with Pearson eText - Standalone Access Card - for Precalculus: Concepts Through Functions, A Right Triangle Approach to Trigonometry |
exponential and logarithmic functions worksheet with answers pdf: Algebra and Trigonometry Jay P. Abramson, Valeree Falduto, Rachael Gross (Mathematics teacher), David Lippman, Rick Norwood, Melonie Rasmussen, Nicholas Belloit, Jean-Marie Magnier, Harold Whipple, Christina Fernandez, 2015-02-13 The text is suitable for a typical introductory algebra course, and was developed to be used flexibly. While the breadth of topics may go beyond what an instructor would cover, the modular approach and the richness of content ensures that the book meets the needs of a variety of programs.--Page 1. |
exponential and logarithmic functions worksheet with answers pdf: Applied Stochastic Differential Equations Simo Särkkä, Arno Solin, 2019-05-02 With this hands-on introduction readers will learn what SDEs are all about and how they should use them in practice. |
exponential and logarithmic functions worksheet with answers pdf: Advanced Calculus (Revised Edition) Lynn Harold Loomis, Shlomo Zvi Sternberg, 2014-02-26 An authorised reissue of the long out of print classic textbook, Advanced Calculus by the late Dr Lynn Loomis and Dr Shlomo Sternberg both of Harvard University has been a revered but hard to find textbook for the advanced calculus course for decades.This book is based on an honors course in advanced calculus that the authors gave in the 1960's. The foundational material, presented in the unstarred sections of Chapters 1 through 11, was normally covered, but different applications of this basic material were stressed from year to year, and the book therefore contains more material than was covered in any one year. It can accordingly be used (with omissions) as a text for a year's course in advanced calculus, or as a text for a three-semester introduction to analysis.The prerequisites are a good grounding in the calculus of one variable from a mathematically rigorous point of view, together with some acquaintance with linear algebra. The reader should be familiar with limit and continuity type arguments and have a certain amount of mathematical sophistication. As possible introductory texts, we mention Differential and Integral Calculus by R Courant, Calculus by T Apostol, Calculus by M Spivak, and Pure Mathematics by G Hardy. The reader should also have some experience with partial derivatives.In overall plan the book divides roughly into a first half which develops the calculus (principally the differential calculus) in the setting of normed vector spaces, and a second half which deals with the calculus of differentiable manifolds. |
exponential and logarithmic functions worksheet with answers pdf: Cracking ACT, with Sample Tests 2003 Princeton Review (Firm), 2003-01-07 The Princeton Review realizes that acing the ACT is very different from getting straight A's in school. We don't try to teach you everything there is to know about math, reading, science, and English-only the techniques you'll need to score higher on the exam. There's a big difference. In Cracking the ACT, we'll teach you how to think like the test writers and -Use Process of Elimination to eliminate answer choices that look right but are planted to fool you -Ace the English test by learning how to spot sentence structure, grammar, and punctuation errors quickly -Crack algebra problems by Plugging In numbers in place of letters -Score higher on reading comprehension by learning to zero in on main ideas, topic sentences, and key words -Solve science reasoning problems by scanning the passage for critical words This book includes four full-length practice ACT exams on CD-ROM, one full-length practice exam in the book, and The Princeton Review Assessment Exam, a full-length diagnostic exam that will predict your scores on both the ACT and the SAT. All of our practice test questions are like the ones you will find on the actual ACT exam, and we include detailed explanations for every answer. |
exponential and logarithmic functions worksheet with answers pdf: SpringBoard Mathematics , 2015 |
exponential and logarithmic functions worksheet with answers pdf: Mathematics Framework for California Public Schools California. Curriculum Development and Supplemental Materials Commission, 1999 |
exponential and logarithmic functions worksheet with answers pdf: Introductory Statistics 2e Barbara Illowsky, Susan Dean, 2023-12-13 Introductory Statistics 2e provides an engaging, practical, and thorough overview of the core concepts and skills taught in most one-semester statistics courses. The text focuses on diverse applications from a variety of fields and societal contexts, including business, healthcare, sciences, sociology, political science, computing, and several others. The material supports students with conceptual narratives, detailed step-by-step examples, and a wealth of illustrations, as well as collaborative exercises, technology integration problems, and statistics labs. The text assumes some knowledge of intermediate algebra, and includes thousands of problems and exercises that offer instructors and students ample opportunity to explore and reinforce useful statistical skills. This is an adaptation of Introductory Statistics 2e by OpenStax. You can access the textbook as pdf for free at openstax.org. Minor editorial changes were made to ensure a better ebook reading experience. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution 4.0 International License. |
exponential and logarithmic functions worksheet with answers pdf: The Book of R Tilman M. Davies, 2016-07-16 The Book of R is a comprehensive, beginner-friendly guide to R, the world’s most popular programming language for statistical analysis. Even if you have no programming experience and little more than a grounding in the basics of mathematics, you’ll find everything you need to begin using R effectively for statistical analysis. You’ll start with the basics, like how to handle data and write simple programs, before moving on to more advanced topics, like producing statistical summaries of your data and performing statistical tests and modeling. You’ll even learn how to create impressive data visualizations with R’s basic graphics tools and contributed packages, like ggplot2 and ggvis, as well as interactive 3D visualizations using the rgl package. Dozens of hands-on exercises (with downloadable solutions) take you from theory to practice, as you learn: –The fundamentals of programming in R, including how to write data frames, create functions, and use variables, statements, and loops –Statistical concepts like exploratory data analysis, probabilities, hypothesis tests, and regression modeling, and how to execute them in R –How to access R’s thousands of functions, libraries, and data sets –How to draw valid and useful conclusions from your data –How to create publication-quality graphics of your results Combining detailed explanations with real-world examples and exercises, this book will provide you with a solid understanding of both statistics and the depth of R’s functionality. Make The Book of R your doorway into the growing world of data analysis. |
exponential and logarithmic functions worksheet with answers pdf: Foundations of Analysis Joseph L. Taylor, 2012 Foundations of Analysis has two main goals. The first is to develop in students the mathematical maturity and sophistication they will need as they move through the upper division curriculum. The second is to present a rigorous development of both single and several variable calculus, beginning with a study of the properties of the real number system. The presentation is both thorough and concise, with simple, straightforward explanations. The exercises differ widely in level of abstraction and level of difficulty. They vary from the simple to the quite difficult and from the computational to the theoretical. Each section contains a number of examples designed to illustrate the material in the section and to teach students how to approach the exercises for that section. --Book cover. |
exponential and logarithmic functions worksheet with answers pdf: Elements of Meteorology Albert Miller, Jack C. Thompson, 1975 The structure of the atmosphere; Atmospheric measurements; The energy of the atmosphere; Atmospheric motions: causes; atmospheric motions: Circulation patterns; Atmospheric motions: Cyclonic vortices; Climate; Weather forecasting; Applications of meteorology; Modification of weather and climate. |
exponential and logarithmic functions worksheet with answers pdf: Introduction to Probability Joseph K. Blitzstein, Jessica Hwang, 2014-07-24 Developed from celebrated Harvard statistics lectures, Introduction to Probability provides essential language and tools for understanding statistics, randomness, and uncertainty. The book explores a wide variety of applications and examples, ranging from coincidences and paradoxes to Google PageRank and Markov chain Monte Carlo (MCMC). Additional application areas explored include genetics, medicine, computer science, and information theory. The print book version includes a code that provides free access to an eBook version. The authors present the material in an accessible style and motivate concepts using real-world examples. Throughout, they use stories to uncover connections between the fundamental distributions in statistics and conditioning to reduce complicated problems to manageable pieces. The book includes many intuitive explanations, diagrams, and practice problems. Each chapter ends with a section showing how to perform relevant simulations and calculations in R, a free statistical software environment. |
exponential and logarithmic functions worksheet with answers pdf: Single Variable Calculus Soo Tang Tan, 2020-02 |
exponential and logarithmic functions worksheet with answers pdf: Discovering Advanced Algebra Jerald Murdock, Ellen Kamischke, 2010 Changes in society and the workplace require a careful analysis of the algebra curriculum that we teach. The curriculum, teaching, and learning of yesterday do not meet the needs of today's students. |
exponential and logarithmic functions worksheet with answers pdf: Functions, Statistics and Trigonometry , 2010 Provides a broad-based, reality-oriented, easy-to-comprehend approach to the topic. Materials are designed to take into account the wide range of backgrounds and knowledge of students. Emphasizes skill in carrying out various algorithms; developing and using mathematical properties, relationships, and proofs; applying mathematics in realistic situations; and representing concepts with graphs or other diagrams. Includes self-test exercises. |
exponential and logarithmic functions worksheet with answers pdf: Precalculus Jay P. Abramson, 2021 Precalculus is adaptable and designed to fit the needs of a variety of precalculus courses. It is a comprehensive text that covers more ground than a typical one- or two-semester college-level precalculus course. The content is organized by clearly-defined learning objectives and includes worked examples that demonstrate problem-solving approaches in an accessible way. |
exponential and logarithmic functions worksheet with answers pdf: MATH 221 FIRST Semester Calculus Sigurd Angenent, 2014-11-26 MATH 221 FIRST Semester CalculusBy Sigurd Angenent |
exponential and logarithmic functions worksheet with answers pdf: Math in Society David Lippman, 2012-09-07 Math in Society is a survey of contemporary mathematical topics, appropriate for a college-level topics course for liberal arts major, or as a general quantitative reasoning course.This book is an open textbook; it can be read free online at http://www.opentextbookstore.com/mathinsociety/. Editable versions of the chapters are available as well. |
exponential and logarithmic functions worksheet with answers pdf: Calculus with Analytic Geometry Richard H. Crowell, William E. Slesnick, 1968 This book introduces and develops the differential and integral calculus of functions of one variable. |
exponential and logarithmic functions worksheet with answers pdf: Precalculus Robert F. Blitzer, 2014 Bob Blitzer has inspired thousands of students with his engaging approach to mathematics, making this beloved series the #1 in the market. Blitzer draws on his unique background in mathematics and behavioral science to present the full scope of mathematics with vivid applications in real-life situations. Students stay engaged because Blitzer often uses pop-culture and up-to-date references to connect math to students' lives, showing that their world is profoundly mathematical. |
exponential and logarithmic functions worksheet with answers pdf: Further Mathematics for Economic Analysis Knut Sydsæter, 2005 Further Mathematics for Economic Analysis By Sydsaeter, Hammond, Seierstad and Strom Further Mathematics for Economic Analysis is a companion volume to the highly regarded Essential Mathematics for Economic Analysis by Knut Sydsaeter and Peter Hammond. The new book is intended for advanced undergraduate and graduate economics students whose requirements go beyond the material usually taught in undergraduate mathematics courses for economists. It presents most of the mathematical tools that are required for advanced courses in economic theory -- both micro and macro. This second volume has the same qualities that made the previous volume so successful. These include mathematical reliability, an appropriate balance between mathematics and economic examples, an engaging writing style, and as much mathematical rigour as possible while avoiding unnecessary complications. Like the earlier book, each major section includes worked examples, as well as problems that range in difficulty from quite easy to more challenging. Suggested solutions to odd-numbered problems are provided. Key Features - Systematic treatment of the calculus of variations, optimal control theory and dynamic programming. - Several early chapters review and extend material in the previous book on elementary matrix algebra, multivariable calculus, and static optimization. - Later chapters present multiple integration, as well as ordinary differential and difference equations, including systems of such equations. - Other chapters include material on elementary topology in Euclidean space, correspondences, and fixed point theorems. A website is available which will include solutions to even-numbered problems (available to instructors), as well as extra problems and proofs of some of the more technical results. Peter Hammond is Professor of Economics at Stanford University. He is a prominent theorist whose many research publications extend over several different fields of economics. For many years he has taught courses in mathematics for economists and in mathematical economics at Stanford, as well as earlier at the University of Essex and the London School of Economics. Knut Sydsaeter, Atle Seierstad, and Arne Strom all have extensive experience in teaching mathematics for economists in the Department of Economics at the University of Oslo. With Peter Berck at Berkeley, Knut Sydsaeter and Arne Strom have written a widely used formula book, Economists' Mathematical Manual (Springer, 2000). The 1987 North-Holland book Optimal Control Theory for Economists by Atle Seierstad and Knut Sydsaeter is still a standard reference in the field. |
exponential and logarithmic functions worksheet with answers pdf: Algebraic Reasoning Paul Gray, Jacqueline Weilmuenster, Jennifer Hylemon, 2016-09-01 Algebraic Reasoning is a textbook designed to provide high school students with a conceptual understanding of algebraic functions and to prepare them for Algebra 2.. |
exponential and logarithmic functions worksheet with answers pdf: Big Ideas Math Ron Larson, Laurie Boswell, 2018 |
exponential and logarithmic functions worksheet with answers pdf: Integrated Math, Course 3, Student Edition CARTER 12, McGraw-Hill Education, 2012-03-01 Includes: Print Student Edition |
exponential and logarithmic functions worksheet with answers pdf: Applied Finite Mathematics , 2008 |
exponential and logarithmic functions worksheet with answers pdf: Integrated Math, Course 2, Student Edition CARTER 12, McGraw-Hill Education, 2012-03-01 Includes: Print Student Edition |
exponential and logarithmic functions worksheet with answers pdf: Rogawski's Calculus for AP* Jon Rogawski, Ray Cannon, 2011-04-11 Rogawski's remarkable textbook was immediately acclaimed for balancing formal precision with a guiding conceptual focus that engages students while reinforcing the relevance of calculus to their lives and future studies. Precise formal proofs, vivid examples, colorful graphics, intuitive explanations, and extraordinary problem sets all work together for an introduction to the course that is engaging and enduring. Watch instructor video reviews here Now Rogawski's Calculus returns in a meticulously updated new edition, in a version designed specifically for AP courses. Rogawski's Calculus for AP*, Second Edition features a new coauthor, Ray Cannon, formerly AP Calculus Chief Reader for the College Board. Among other contributions, Dr. Cannon wrote this version's end-of-chapter multiple choice and Free Response Questions, giving students the opportunity to work the same style of problems they will see on the AP exam. TEACHERS: Download now or click here to request Rogawski's Calculus for AP*, Second Edition Chapter Sampler for Early Transcendentals, featuring Chapter 3, Differentiation |
exponential and logarithmic functions worksheet with answers pdf: Discrete Mathematics for Computer Science Gary Haggard, John Schlipf, Sue Whitesides, 2006 Master the fundamentals of discrete mathematics with DISCRETE MATHEMATICS FOR COMPUTER SCIENCE with Student Solutions Manual CD-ROM! An increasing number of computer scientists from diverse areas are using discrete mathematical structures to explain concepts and problems and this mathematics text shows you how to express precise ideas in clear mathematical language. Through a wealth of exercises and examples, you will learn how mastering discrete mathematics will help you develop important reasoning skills that will continue to be useful throughout your career. |
exponential and logarithmic functions worksheet with answers pdf: Generalized Linear Models for Insurance Rating Mark Goldburd, Anand Khare, Dan Tevet, 2016-06-08 |
exponential and logarithmic functions worksheet with answers pdf: Peterson's Master AP Calculus AB & BC W. Michael Kelley, Mark Wilding, 2007-02-12 Provides review of mathematical concepts, advice on using graphing calculators, test-taking tips, and full-length sample exams with explanatory answers. |
exponential and logarithmic functions worksheet with answers pdf: Common Core Algebra II Kirk Weiler, 2016-06-01 |
exponential and logarithmic functions worksheet with answers pdf: Algebra 2, Student Edition McGraw Hill, 2002-03-06 Glencoe Algebra 2 strengthens student understanding and provides the tools students need to succeed , from the first day your students begin to learn the vocabulary of algebra until the day they take final exams and standardized tests. |
exponential and logarithmic functions worksheet with answers pdf: Differential Equations with Boundary-value Problems Dennis G. Zill, Michael R. Cullen, 2005 Now enhanced with the innovative DE Tools CD-ROM and the iLrn teaching and learning system, this proven text explains the how behind the material and strikes a balance between the analytical, qualitative, and quantitative approaches to the study of differential equations. This accessible text speaks to students through a wealth of pedagogical aids, including an abundance of examples, explanations, Remarks boxes, definitions, and group projects. This book was written with the student's understanding firmly in mind. Using a straightforward, readable, and helpful style, this book provides a thorough treatment of boundary-value problems and partial differential equations. |
How can I read this in English? m³ (3-small 3) - exponent
Apr 22, 2010 · I am wondering how I can read this in English. For example, m³ , m². (triple m? double m?) I have …
How to pronounce 5x10^5, e.g. | WordReference Forums
Mar 18, 2013 · Normally I'd say five by ten to the five and two by ten to the eight.The power can be expressed by …
2 to the n - WordReference Forums
Apr 28, 2022 · The "proper" way to represent mathematical powers, i.e. a base number and an exponent, is an …
elevamento a potenza - "X alla" - WordReference Forums
Oct 17, 2007 · Ciao Qualcuno mi sa dire come si traduce in inglese una frase tipo: "3 alla quinta"? (oppure "3 …
How can I read this in English? m³ (3-small 3) - exponent
Apr 22, 2010 · I am wondering how I can read this in English. For example, m³ , m². (triple m? double m?) I have no idea. Please help me!
How to pronounce 5x10^5, e.g. | WordReference Forums
Mar 18, 2013 · Normally I'd say five by ten to the five and two by ten to the eight.The power can be expressed by longer forms - we say ten to the five, ten to the power of five, or ten to the fifth …
2 to the n - WordReference Forums
Apr 28, 2022 · The "proper" way to represent mathematical powers, i.e. a base number and an exponent, is an issue of style, which is often dictated to you by whoever writes your paycheck …
elevamento a potenza - "X alla" - WordReference Forums
Oct 17, 2007 · Ciao Qualcuno mi sa dire come si traduce in inglese una frase tipo: "3 alla quinta"? (oppure "3 elevato alla quinta")? e in generale come si fanno le potenze? So che un numero …