f(x) = x7 In(x) %3D (a) Find the interval on which f is incre Find the interval on which f is decreasi

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 93E
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.J.010.
IVI 1 NOTES
ASR YUUR TEACHER
PRAC
Consider the equation below. (If an answer does not exist, enter DNE.)
f(x) = x In(x)
(a) Find the interval on which f is increasing. (Enter your answer using interval notation.)
Find the interval on which f is decreasing. (Enter your answer using interval notation.)
(b) Find the local minimum and maximum values of f.
local minimum value
local maximum value
(c) Find the inflection point.
(х, у) %3
Find the interval on which f is concave up. (Enter your answer using interval notation.)
Find the interval on which f is concave down. (Enter your answer using interval notation.)
Additional Materials
Transcribed Image Text:.J.010. IVI 1 NOTES ASR YUUR TEACHER PRAC Consider the equation below. (If an answer does not exist, enter DNE.) f(x) = x In(x) (a) Find the interval on which f is increasing. (Enter your answer using interval notation.) Find the interval on which f is decreasing. (Enter your answer using interval notation.) (b) Find the local minimum and maximum values of f. local minimum value local maximum value (c) Find the inflection point. (х, у) %3 Find the interval on which f is concave up. (Enter your answer using interval notation.) Find the interval on which f is concave down. (Enter your answer using interval notation.) Additional Materials
Expert Solution
Step 1

Given: fx=x7lnx

we know that any given functionfx is in increasing in a interval, if f'x>0 in that interval and decreasing in a interval, if f'x<0 in that interval

so, finding derivative of given function

f'x=ddxx7lnx                                             ddxu.v=vdudx+udvdx=lnxddxx7+x7ddxlnx                        ddxx7=7x6, ddxlnx=1x=lnx7x6+x71x=7x6lnx+x6=x67lnx+1                                          ..1 

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