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If f is real-valued differentiable funct...

If `f` is real-valued differentiable function such that `f(x)f'(x)<0` for all real x, then

A

f(x) is increasing

B

f(x) is decereasing

C

|f (x)|is increasing

D

|f(x)| is decreasing

Text Solution

Verified by Experts

The correct Answer is:
D
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