Chapter 14.5, Problem 13E

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11th Edition

Ronald J. Harshbarger + 1 other

ISBN: 9781305108042

Textbook Problem

Find the maximum value of

To determine

**To calculate:** The maximum value of

Explanation

**Given Information:**

The provided function is

**Formula used:**

Lagrange Multipliers Method:

According to the Lagrange multipliers method to obtain maxima or minima for a function

Step 1: Find the critical values of

Step 2: The critical points of

Step 3: The critical points of

For a function *y* is calculated by taking the derivative of *y* and keeping the other variables *x* and *z* constant. The partial derivative of *y* is denoted by

Power of

Constant function rule for a constant

Coefficient rule for a constant

**Calculation:**

Consider the function,

The provided constraint is

According to the Lagrange multipliers method,

The objective function is

Here,

Put the values of

Since, the critical points of

Recall that, for a function *y* is calculated by taking the derivative of *y* and keeping the other variables *x* and *z* constant.

Use the power of *x* rule for derivatives, the constant function rule and the coefficient rule.

The objective function is

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