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

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

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

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

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

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

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

Find the interval for which f(x)=x-sinx is increasing or decreasing.

Find the interval for which f(x)=x-sinx is increasing or decreasing.