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Jason

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Bruce

College Algebra covers algebraic topics and skills necessary to succeed in college-level math

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Johnny

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Kylia

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Study topics incliding trogonometric functions, identities and equations, solutions of triangles, complex numbers, and other topics as time permits

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Callie

Learn the toughest concepts covered in Precalculus with step-by-step video tutorials and practice problems by world-class tutors

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Nick

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Dive deep into Python with videos and more.

Introduction to Python

Arianne Dee

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Mariya Breyther

Introduction to Microsoft Power BI

Microsoft Power BI

Chris Sorensen

Data Analysis Fundamentals with Excel

Data Analysis - Excel

Chris Sorensen & Ammul Shergill

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George Levy

Learn Enough HTML, CSS and Layout to be Dangerous

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Lee Donahoe & Michael Hartl

Learn Enough JavaScript to be Dangerous: A Tutorial Introduction to Programming with JavaScript

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Michael Hartl

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Jared P. Lander

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Mike Moran

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Jeffrey K. Pinto

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Need a solid foundation before calculus? Precalculus concepts like functions, sequences, and limits are clarified to prepare you for success.

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Patrick Ford

0. Fundamental Concepts of Algebra

1. Equations and Inequalities

2. Graphs

3. Functions & Graphs

4. Polynomial Functions

5. Rational Functions

6. Exponential and Logarithmic Functions

7. Measuring Angles

8. Trigonometric Functions on Right Triangles

9. Unit Circle

10. Graphing Trigonometric Functions

11. Inverse Trigonometric Functions and Basic Trig Equations

12. Trigonometric Identities 

13. Non-Right Triangles

14. Vectors

15. Polar Equations

16. Parametric Equations

17. Graphing Complex Numbers

18. Systems of Equations and Matrices

19. Conic Sections

20. Sequences, Series & Induction

21. Combinatorics and Probability

22. Limits & Continuity

23. Intro to Derivatives & Area Under the Curve

Default TOC

Products and Quotients of Complex Numbers

Powers of Complex Numbers (DeMoivre's Theorem)

Two Variable Systems of Linear Equations

Introduction to Matrices

Determinants and Cramer's Rule

Graphing Systems of Inequalities

Introduction to Conic Sections

Circles

Ellipses: Standard Form

Parabolas

Hyperbolas at the Origin

Hyperbolas NOT at the Origin

Sequences

Arithmetic Sequences

Geometric Sequences

Factorials

Combinatorics

Probability

Introduction to Limits

Finding Limits Algebraically

Continuity

Tangent Lines & Derivatives

Limits at Infinity

Limits of Sequences

Area Under a Curve

Precalculus Final - Part 2 of 2

The first term (a1) and the common ratio (r) of a geometric sequence are given. Find the specified term using the general term (nth term) formula.Find a15 when a1 = 4, r = -3.

The first term (a₁) and the common ratio (r) of a geometric sequence are given. Find the specified term using the general term (n^th term) formula.
Find a₁₅ when a₁ = 4, r = -3.