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

Options

A. Strictly increasing in `(-infty,-2)` and strictly decreasing 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) uu (3,infty)`

Answer

B