Find the intervals in which `f(x)=x^8+6x^2` 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)=10-6x-2x^2 is increasing or decreasing.

Find the intervals in which f(x)=6-9x-x^(2) is increasing or decreasing.

Find the intervals in which f(x)=6-9x-x^2 is increasing or decreasing.

Find the intervals in which f(x)=x^3-6x^2+9x+15 is increasing or decreasing.

Find the intervals in which f(x)=10-6x-2x^(2) is increasing or decreasing.

Find the intervals in which f(x)=(x)/(log x) is increasing or decreasing

Find the intervals in which f(x)=(x)/(log x) is increasing or decreasing.

Find the intervals in which f(x)=(x)/(log x) is increasing or decreasing