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+1 vote
3.1k views
in Differentiation by (28.8k points)
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If f(x) = |x2 – 9x + 20|, then f’(x) is equal to 

A. –2x + 9 for all xϵ R

B. 2x – 9 if 4 < x < 5

C. –2x + 9 if 4 < x < 5

D. none of these

1 Answer

+2 votes
by (30.0k points)
selected by
 
Best answer

Correct option is C. –2x + 9 if 4 < x < 5

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