Find the intervals in which `f(x)=x|x|,\ \ x in R` is increasing or decreasing:

Find the intervals in which f(x)=x|x|,quad x in R is increasing or decreasing:

Find the intervals in which f(x)=x/2+2/x ,\ \ x!=0 is increasing or decreasing.

f : R^(+)to R^(+), f(x)=(log x)/(sqrt(x)) . Find the intervals in which f(x) is increasing or decreasing.

Find the intervals in which f(x)=x/2+2/x , x!=0 is increasing or decreasing.

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

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+20 is increasing or decreasing.

Find the intervals in which f(x)=x^3-6x^2-36 x+2 is increasing or decreasing.

Find the intervals in which f(x)=5+36 x+3x^2-2x^3 is increasing or decreasing.

Find the intervals in which f(x)=8+36 x+3x^2-2x^3 is increasing or decreasing.