" (iv) "f(x)=2x^(3)-12x^(2)+18x+15

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

Determine the intervals in which the following functions are strictly increasing or strictly decreasing : f(x)=2x^(3)-12x^(2)+18x+5

f(x)=6-12x-18x^(2)

Find the intervals in which the following functions are strictly increasing or decreasing : f(x)=2x^(3)-9x^(2)-12x+15

Determine the intervals in which the following functions are strictly increasing or strictly decreasing : f(x)=2x^(3)-9x^(2)+12x+15

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