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Find the intervals in which the function f given by f(x) = 4x^3 - 6x^2 - 72x + 30 is

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Find the intervals in which the function f given by f(x) = 4x3 - 6x2 - 72x + 30 is

(a) strictly increasing

(b) strictly decreasing

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1 Answer

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f(x) = 4x3 - 6x2 - 72x + 30

The points divide the real line into 3 disjoint intervals.

i.e. 

Step 4:

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