The interval on which `f(x)=2x^(3)+9x^(2)+12x-1` is decreasing in

Find the intervals in which f(x)=-2x^(3)-9x^(2)-12x+1 is increasing or decreasing.

Find the intervals in which f(x)=2x^(3)-9x^(2)+12x-5 is increasing or decreasing.

Find the intervals in which f(x)=2x^(3)+9x^(2)+12x+20 is increasing or decreasing.

The interval on which function f(x) = 2x^(3)+9x^(2)+12x-1 is decreasing is

Find the intervals in which f(x) = 2x^(3) - 9x^(2) - 12 x -3 is increasing and the intervals in which f(x) is decreasing.

Find the intervals in which f(x)=2x^(3)-12x^(2)+18x+15 is increasing or decreasing.

The interval on which the function f(x)=2x^(3)+9x^(2)+12x-1 is decreasing is :

Find the intervals in which f(x)=-2x^3-9x^2-12 x+1 is increasing or decreasing.

Find the intervals in which f(x)=2x^3-9x^2+12 x-5 is increasing or decreasing.