Question

cat este $ln^{2}x$ derivat

Answer 1

$(\ln^ 2x)'=(\ln x\cdot \ln x)'=(\ln x)'\cdot \ln x+\ln x\cdot (\ln x)'=\dfrac{\ln x}{x}+\dfrac{\ln x}{x}= \\ =\boxed{\dfrac{2\ln x}{x}}$