TeX Quellcode:
\begin{array}{rcl}g'_{xx}(x,y) &=& \dfrac{1}{2}\cdot \left(-\dfrac{1}{2}\right)x^{-\frac{1}{2}-1}+0 \\\\&=& -\dfrac{1}{4}x^{-\frac{3}{2}} \\\\&=& \dfrac{-1}{4\sqrt{x^3}}\end{array}