The function f(x)=(x^(4)-42x^(2)-80x+32...

The function `f(x)=(x^(4)-42x^(2)-80x+32)^(3)` is :

A

Monotonically increasing in `(-4,-1) cup (5,oo)`

B

Monotonically increasing in `(-oo,-4) cup (-1,5)`

C

Monotonically increasing in (-4,5)

D

None of these

Verified by Experts

The correct Answer is:

A

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