Find the intervals in which `f(x)=(4x^2+1)/x` is increasing or decreasing.

Let f(x)=sin^(-1)((2phi(x))/(1+phi^(2)(x))) . Find the interval in which f(x) is increasing or decreasing.

Let f(x)=sin^(-1)((2phi(x))/(1+phi^(2)(x))) . Find the interval in which f(x) 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)/(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

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

Find the intervals in which f(x)=x^(4)-4x is increasing or decreasing.

Find the intervals for which f(x)=x^(4)-2x^(2) is increasing or decreasing.

Find the intervals for which f(x)=x^4-2x^2 is increasing or decreasing.