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+1 vote
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in Differentiation by (28.8k points)
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If f(x) = \(\sqrt{\text x^2+6\text x+9},\) then f'(x) is equal to

A. 1 for x < –3

B. –1 for x < –3

C. 1 for all xϵ R

D. none of these

1 Answer

+1 vote
by (30.0k points)
selected by
 
Best answer

Correct option is B. –1 for x < –3

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