Sketch the graph of ƒ(x) = ln | x | and explain how the graphshows that ƒ′(x) = 1/x.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.4: Logarithmic Functions
Problem 45E
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 Sketch the graph of ƒ(x) = ln | x | and explain how the graph
shows that ƒ′(x) = 1/x
.

Expert Solution
Step 1

Solution:

Consider the given function is 

f(x) = ln x

we have the graph of the given function is

Calculus homework question answer, step 1, image 1

we know the function modulus is defined as

x = x,   x>0-x,  x<0

Also, ln x is defined as positive when x is greater or equal to 1 and not defined for negative values of x

 

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