
Calculus: Early Transcendentals
8th Edition
ISBN: 9781285741550
Author: James Stewart
Publisher: Cengage Learning
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![**Problem: Find the Derivative**
Given the function:
\[
y(x) = \sqrt{x^2 + 12}
\]
Calculate \(\frac{dy}{dx}\).
**Solution:**
Find \(\frac{dy}{dx} =\) [Blank space for solution]
---
This problem presents a function \(y(x)\) and asks for the derivative \(\frac{dy}{dx}\). The function involves a square root, suggesting the use of chain rule for differentiation.
### Explanation:
1. **Identify the Outer Function**: The square root, \(\sqrt{u}\) (where \(u = x^2 + 12\)).
2. **Differentiate the Outer Function**: The derivative of \(\sqrt{u}\) is \(\frac{1}{2\sqrt{u}}\).
3. **Identify the Inner Function**: \(u = x^2 + 12\).
4. **Differentiate the Inner Function**: The derivative of \(x^2 + 12\) with respect to \(x\) is \(2x\).
5. **Apply the Chain Rule**: Multiply the derivative of the outer function by the derivative of the inner function.
The full differentiation process results in:
\[
\frac{dy}{dx} = \frac{1}{2\sqrt{x^2 + 12}} \times 2x = \frac{x}{\sqrt{x^2 + 12}}
\]](https://content.bartleby.com/qna-images/question/19e290b3-c32d-41c1-939c-80705e447f02/73d1ae95-5cb2-443d-be83-824cb6fa5078/sgfqx4c_thumbnail.png)
Transcribed Image Text:**Problem: Find the Derivative**
Given the function:
\[
y(x) = \sqrt{x^2 + 12}
\]
Calculate \(\frac{dy}{dx}\).
**Solution:**
Find \(\frac{dy}{dx} =\) [Blank space for solution]
---
This problem presents a function \(y(x)\) and asks for the derivative \(\frac{dy}{dx}\). The function involves a square root, suggesting the use of chain rule for differentiation.
### Explanation:
1. **Identify the Outer Function**: The square root, \(\sqrt{u}\) (where \(u = x^2 + 12\)).
2. **Differentiate the Outer Function**: The derivative of \(\sqrt{u}\) is \(\frac{1}{2\sqrt{u}}\).
3. **Identify the Inner Function**: \(u = x^2 + 12\).
4. **Differentiate the Inner Function**: The derivative of \(x^2 + 12\) with respect to \(x\) is \(2x\).
5. **Apply the Chain Rule**: Multiply the derivative of the outer function by the derivative of the inner function.
The full differentiation process results in:
\[
\frac{dy}{dx} = \frac{1}{2\sqrt{x^2 + 12}} \times 2x = \frac{x}{\sqrt{x^2 + 12}}
\]
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