Find the intervals in which the function : `f(x) = 2 x^3 - 3 x^2 - 36x + 7` is Strictly increasing

Find the intervals in which the function : f(x) = 2 x^3 - 3 x^2 - 36x + 7 is Strictly decreasing

Find the intervals in which the function : f(x) = 2 x^3 - 9 x^2 + 12x + 30 is Strictly increasing

Find the intervals in which the function : f(x) = x^3 + 3x^2 - 105 x + 25 is strictly increasing

Find the intervals in which the function : f(x) = x^3 + 3x^2 - 105 x + 25 is strictly decreasing

Find the intervals in which the function : f (x) = 20 - 9x + 6x^2 - x^3 is strictly increasing.

Find the intervals in which the function f(x)=2x^3 -15x^2 + 36x + 1 is strictly increasing

Find the intervals in which the function f(x)=2x^3 -15x^2 + 36x + 1 is strictly decreasing

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