   Chapter 11.1, Problem 39E ### Mathematical Applications for the ...

11th Edition
Ronald J. Harshbarger + 1 other
ISBN: 9781305108042

#### Solutions

Chapter
Section ### Mathematical Applications for the ...

11th Edition
Ronald J. Harshbarger + 1 other
ISBN: 9781305108042
Textbook Problem

# In Problems 39-42, find the relative maxima and relative minima, and sketch the graph with a graphing calculator to check your results. y = x ln x

To determine

To calculate: The value of relative maxima and relative minima for the function y=xlnx and sketch the graph using graphing calculator to check.

Explanation

Given Information:

The function is y=xlnx.

Formula Used:

Product rule,

ddx(uv)=uv+uv, where u and v are two separate functions.

Derivative of logarithmic function,

ddx(lnx)=1x

Power rule of differentiation,

ddx(xn)=nxn1

Chain rule of differentiation,

ddxf(g(x))=f(g(x))g(x)

Calculation:

Consider the provided function y=xlnx.

First calculate the derivative of the function.

Recall the product rule of derivatives,

ddx(uv)=uv+uv

Apply the product rule ton given function to get,

y=ddx(xlnx)=ddxxln(x)+xddx(lnx)

Recall, the chain rule of derivatives.

By chain rule,

ddxf(g(x))=fg(x)g(x)

Apply the chain rule to get,

y=ddxxln(x)+xddx(lnx)=ddxxln(x)+xddx(lnx)ddxx

Recall, the property of derivative,

Properties of derivative,

ddx(lnx)=1x

Also, recall the power rule,

ddx(xn)=nxn1

Apply the properties on the given function to get,

y=<

### Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

#### The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

#### Evaluate the limit, if it exists. limx2x2+x5x5

Single Variable Calculus: Early Transcendentals

#### Find if , y = sin 2t.

Study Guide for Stewart's Multivariable Calculus, 8th

#### True or False: ln(a + b) = ln a + ln b.

Study Guide for Stewart's Single Variable Calculus: Early Transcendentals, 8th 