SubArea: Analyzing function behaviorLevel: AProject ID: 9000079104Accepted: 1Clonable: 0Easy: 0Find the $x$ at which has the function $f$ a local minimum. \[ f(x) = \frac{\ln x} {x} \]does not exist\(x = 0\)\(x = 1\)\(x =\mathrm{e}\)
