(x, y) = (| relative maxima relative minima (х, у) %3D points of inflection (х, у) %- (smaller x-value) points of inflection (х, у) - (larger x-value)

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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**Educational Content:**

Below is a function along with its first and second derivatives. Use these definitions to identify the relative maxima, relative minima, and points of inflection as required.

### Function and Derivatives:
- **Function:** \( y = x^{1/3}(x - 8) \)
- **First Derivative:** \( y' = \frac{4(x - 2)}{3x^{2/3}} \)
- **Second Derivative:** \( y'' = \frac{4(x + 4)}{9x^{5/3}} \)

### Instructions:
Using the given function and its derivatives, determine the following:

1. **Relative Maxima**  
   Identify the \( (x, y) \) coordinates where the function has a relative maximum.

2. **Relative Minima**  
   Identify the \( (x, y) \) coordinates where the function has a relative minimum.

3. **Points of Inflection**  
   Determine the \( (x, y) \) coordinates where the function has points of inflection, considering both the smaller and larger x-values.

### Answer Boxes:

- **Relative Maxima \((x, y) = ( \, \underline{\hspace{2cm}} \, )\)**

- **Relative Minima \((x, y) = ( \, \underline{\hspace{2cm}} \, )\)**

- **Points of Inflection**  
  \((x, y) = ( \, \underline{\hspace{2cm}} \, )\) (smaller x-value)  
  \((x, y) = ( \, \underline{\hspace{2cm}} \, )\) (larger x-value)

If an answer does not exist for any of the categories, enter "DNE" (Does Not Exist).
Transcribed Image Text:**Educational Content:** Below is a function along with its first and second derivatives. Use these definitions to identify the relative maxima, relative minima, and points of inflection as required. ### Function and Derivatives: - **Function:** \( y = x^{1/3}(x - 8) \) - **First Derivative:** \( y' = \frac{4(x - 2)}{3x^{2/3}} \) - **Second Derivative:** \( y'' = \frac{4(x + 4)}{9x^{5/3}} \) ### Instructions: Using the given function and its derivatives, determine the following: 1. **Relative Maxima** Identify the \( (x, y) \) coordinates where the function has a relative maximum. 2. **Relative Minima** Identify the \( (x, y) \) coordinates where the function has a relative minimum. 3. **Points of Inflection** Determine the \( (x, y) \) coordinates where the function has points of inflection, considering both the smaller and larger x-values. ### Answer Boxes: - **Relative Maxima \((x, y) = ( \, \underline{\hspace{2cm}} \, )\)** - **Relative Minima \((x, y) = ( \, \underline{\hspace{2cm}} \, )\)** - **Points of Inflection** \((x, y) = ( \, \underline{\hspace{2cm}} \, )\) (smaller x-value) \((x, y) = ( \, \underline{\hspace{2cm}} \, )\) (larger x-value) If an answer does not exist for any of the categories, enter "DNE" (Does Not Exist).
Expert Solution
Step 1

The given function is y=x1/3(x-8).

The first and the second derivative of y is y'=4(x-2)3x23                          ...... (1).

The second derivative of is y''=4(x+4)9x53                          ...... (2).

Compute the relative extrema as follows.

Substitute y'=0 in equation (1).

4(x-2)3x23=04(x-2)=0x=2

The y'=4(x-2)3x23is observed to be undefined at x=0.

Thus, the critical points are x=0 and x=2.

 

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