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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 `(-oo,−2)` and strictly decreasing in `( −2,oo)`

B

Strictly decreasing in ( −2,3)

C

Strictly decreasing in `(−oo,3)` and strictly increasing in `(3, oo)`

D

Strictly decreasing in `(-oo,−2) cup (3,oo)`

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