The real function f(x) =2x^(3)-3x^(2)-36...

The real function `f(x) =2x^(3)-3x^(2)-36x +7` is:

A

Strictly increasing in `(-infty,-2)` and strictly increasing in `(-2, infty)`

B

Strictly decreasing in (-2,3)

C

Strictly decreasing in `(-infty,3)` and strictly increasing in `(3, infty)`

D

Strictly decreasing in `(-infty,-2)cup(3,infty)`

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The correct Answer is:

B

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