Find the derivative of f(x)=xf(x) = \sqrt{x}f(x)=x.
12x−1/2\frac{1}{2}x^{-1/2}21x−1/2
2x2\sqrt{x}2x
1x\frac{1}{\sqrt{x}}x1
12x\frac{1}{2}\sqrt{x}21x