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12 Nov 2021

Given information

As per the given question,

Step-by-step explanation

Step 1.
The graph is concave up when   and concave downward when  .
 
The derivative of  is positive when   is increasing.
The derivative of   is negative when   is decreasing.
 
It is visible from the graph that the graph is concave up when
 
 
The graph is concave down when,
 

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Single Variable Calculus: Early Transcendentals
4th Edition, 2018
Stewart
ISBN: 9781337687805

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