a) f*(3) = b) f' (9) =

Calculus: Early Transcendentals
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Author:James Stewart
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Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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### Problem Statement

**7) Use the table and the fact that \( f(x) \) is invertible and differentiable everywhere to find:**

\[ 
\begin{array}{|c|c|c|}
\hline
x & f(x) & f'(x) \\
\hline
3 & 1 & 7 \\
\hline
6 & 2 & 10 \\
\hline
9 & 3 & 5 \\
\hline
\end{array}
\]

**a) \( f^{-1}(3) = \)**

**b) \( f'(9) = \)**

**c) \( (f^{-1})'(3) = \)**

### Explanation of Table

The table provided consists of three columns:

- The first column represents the values of \( x \).
- The second column represents the corresponding values of \( f(x) \) for each \( x \).
- The third column represents the derivative of the function \( f(x) \), denoted as \( f'(x) \).

### Requirements

To solve the given problem, you will need to:

**a) Determine the value of the inverse function \( f^{-1}(x) \) at \( x = 3 \).**

Since \( f(x) = 3 \) when \( x = 9 \) (from the table), this means \( f^{-1}(3) = 9 \).

**b) Determine the value of the derivative function \( f'(x) \) at \( x = 9 \).**

From the table, \( f'(9) = 5 \).

**c) Determine the value of the derivative of the inverse function \( (f^{-1})'(x) \) at \( x = 3 \).**

Using the formula for the derivative of an inverse function:

\[ (f^{-1})'(y) = \frac{1}{f'(f^{-1}(y))} \]

First, we need to find \( f^{-1}(3) \), which we've already determined as \( 9 \). Now, use the value of \( f'(9) \):

\[ (f^{-1})'(3) = \frac{1}{f'(9)} = \frac{1}{5} \]

### Solutions

**a) \( f^{-1}(3) = 9 \)**
Transcribed Image Text:### Problem Statement **7) Use the table and the fact that \( f(x) \) is invertible and differentiable everywhere to find:** \[ \begin{array}{|c|c|c|} \hline x & f(x) & f'(x) \\ \hline 3 & 1 & 7 \\ \hline 6 & 2 & 10 \\ \hline 9 & 3 & 5 \\ \hline \end{array} \] **a) \( f^{-1}(3) = \)** **b) \( f'(9) = \)** **c) \( (f^{-1})'(3) = \)** ### Explanation of Table The table provided consists of three columns: - The first column represents the values of \( x \). - The second column represents the corresponding values of \( f(x) \) for each \( x \). - The third column represents the derivative of the function \( f(x) \), denoted as \( f'(x) \). ### Requirements To solve the given problem, you will need to: **a) Determine the value of the inverse function \( f^{-1}(x) \) at \( x = 3 \).** Since \( f(x) = 3 \) when \( x = 9 \) (from the table), this means \( f^{-1}(3) = 9 \). **b) Determine the value of the derivative function \( f'(x) \) at \( x = 9 \).** From the table, \( f'(9) = 5 \). **c) Determine the value of the derivative of the inverse function \( (f^{-1})'(x) \) at \( x = 3 \).** Using the formula for the derivative of an inverse function: \[ (f^{-1})'(y) = \frac{1}{f'(f^{-1}(y))} \] First, we need to find \( f^{-1}(3) \), which we've already determined as \( 9 \). Now, use the value of \( f'(9) \): \[ (f^{-1})'(3) = \frac{1}{f'(9)} = \frac{1}{5} \] ### Solutions **a) \( f^{-1}(3) = 9 \)**
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