f(x) D E A B The graph of a function f(x) is shown above. Q8.1 Multiple choice 1 Point At which point A, B, C, D, or E is it true that f' (x) and f"(x) are both positive? O Point A O Point B Point C Point D Point E

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.5: Graphs Of Functions
Problem 59E
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f(x)
E
A
The graph of a function f (x) is shown above.
Q8.1 Multiple choice
1 Point
At which point A, B, C, D, or E is it true that f' (x) and f" (x) are both positive?
Point A
Point B
Point C
Point D
Point E
Transcribed Image Text:f(x) E A The graph of a function f (x) is shown above. Q8.1 Multiple choice 1 Point At which point A, B, C, D, or E is it true that f' (x) and f" (x) are both positive? Point A Point B Point C Point D Point E
Expert Solution
Step 1: Here we have determine point at which both f' and f" are positive.

We have given with graph of f(x), and the points A, B, C, D, E on it. 

We know that, if slope of the tangent at a point  is positive then the derivative of function at that point

is also positive.

Here we can easily observed that at point B on graph of f(x), the slope of tangent to f(x) at point B is positive.

(Because tangent line at point B is increasing)

f'(x) is positive at point B.

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