Find the intervals in which the function...

Find the intervals in which the function f given by `f(x)=4x^3-6x^2-72 x+30`is (a) strictly increasing (b) strictly decreasing

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NCERT GUJARATI-APPLICATION OF DERIVATIVES-EXERCISE 6.6

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