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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
20 Dec 2021

Given information

Step-by-step explanation

Step 1.
Using a calculator, I found that
 
And that
 
We know that
 
Where  
As   increases the slope of the function at  increases.
By definition,   is a number such that the slope of   is 1 at  
We saw earlier that slope of   for   is less than 1 and for   is more than 1 .
Therefore, the slope of must be between   and  , because the slope of   when   is 1 .

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