Table of contents

0. Functions7h 52m
1. Limits and Continuity2h 2m
2. Intro to Derivatives1h 33m
3. Techniques of Differentiation3h 18m
4. Applications of Derivatives2h 38m
5. Graphical Applications of Derivatives6h 2m
6. Derivatives of Inverse, Exponential, & Logarithmic Functions2h 37m
7. Antiderivatives & Indefinite Integrals1h 26m
8. Definite Integrals4h 44m
9. Graphical Applications of Integrals2h 27m
- Area Between Curves
  1h 18m
- Introduction to Volume & Disk Method
  1h 8m
10. Physics Applications of Integrals 3h 16m
- Kinematics
  1h 13m
- Work
  2h 3m
11. Integrals of Inverse, Exponential, & Logarithmic Functions2h 34m
12. Techniques of Integration7h 39m
13. Intro to Differential Equations2h 55m
14. Sequences & Series5h 36m
15. Power Series2h 19m
- Introduction to Power Series
  1h 9m
- Taylor Series & Taylor Polynomials
  1h 10m
16. Parametric Equations & Polar Coordinates7h 58m

0. Functions

Combining Functions

Calculus

0. Functions

Combining Functions

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1:50 minutes

Problem 35

Textbook Question

Composite functions and notation
Let ƒ(x)= x² - 4 , g(x) = x³ and F(x) = 1/(x-3).
Simplify or evaluate the following expressions.
F(g(y))

Verified step by step guidance

Identify the functions involved: \( F(x) = \frac{1}{x-3} \) and \( g(x) = x^3 \).

Understand the composition of functions: \( F(g(y)) \) means substituting \( g(y) \) into \( F(x) \).

Calculate \( g(y) \): Since \( g(x) = x^3 \), then \( g(y) = y^3 \).

Substitute \( g(y) = y^3 \) into \( F(x) \): Replace \( x \) in \( F(x) = \frac{1}{x-3} \) with \( y^3 \).

Simplify the expression: \( F(g(y)) = \frac{1}{y^3 - 3} \).

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Composite Functions

A composite function is formed when one function is applied to the result of another function. In this case, F(g(y)) means we first evaluate g(y) and then use that result as the input for F. Understanding how to combine functions is crucial for simplifying expressions involving multiple functions.

Function Notation

Function notation is a way to denote functions and their inputs clearly. For example, f(x) indicates that f is a function of x. This notation helps in identifying which function to apply and in what order, especially when dealing with composite functions like F(g(y)).

Simplification of Expressions

Simplification involves reducing an expression to its simplest form, making it easier to understand or compute. In the context of composite functions, this may include substituting values and performing algebraic operations to combine the functions into a single expression, which is essential for evaluating F(g(y)).