Find the intervals in which the function...

Find the intervals in which the function f given by `f(x)=2x^3-3x^2-36 x+7`is (a) strictly increasing (b) strictly decreasing

A

(-2, 3)

B

(-∞, -2)

C

(3, ∞)

D

None of these

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The correct Answer is:

A

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