What is the derivative of f(x)=lnxxf(x) = \frac{\ln x}{x}f(x)=xlnx?
(1−lnx)/x2(1 - \ln x) / x^2(1−lnx)/x2
1/x21/x^21/x2
ln(x)/x2\ln(x) / x^2ln(x)/x2
1/x1/x1/x