Differentiate

What to do if a differentiate question has square roots'

$y=\sqrt x\\ y=x^{1/2}\\ y'=\frac{1}{2}x^{1/2-1}\\ y'=\frac{1}{2}x^{-1/2}\\ y'=\frac{1}{2x^{0.5}}\\ y'=\frac{1}{2\sqrt x}\\$