Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
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) \( f^{-1}(3) = 9 \)**](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa55013e1-91aa-48be-9c4b-bf8a0e47de22%2Fb01ba9a2-92f2-4787-8dfc-2d5eecfb7070%2Fjtnihn_processed.png&w=3840&q=75)
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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