$\eqalign{ & Differentieer: \cr & I. \cr & f(x) = 2{}^{10}\log \left( {1 - x} \right) \cr & II. \cr & f(x) = \frac{{{}^{\frac{1}{2}}\log x}}{{1 - {}^{\frac{1}{2}}\log x}} \cr} $