Calculate f′(x)f'(x)f′(x) for f(x)=1lnxf(x) = \frac{1}{\ln x}f(x)=lnx1.
−1/(x(lnx)2)-1 / (x (\ln x)^2)−1/(x(lnx)2)
1/x1/x1/x
−1/(lnx)2-1 / (\ln x)^2−1/(lnx)2
exe^xex