Given f(x)=0.1x1−xf(x) = \frac{0.1x}{1-x}f(x)=1−x0.1x, find f−1(0.5)f^{-1}(0.5)f−1(0.5).
0.8330.8330.833
0.6670.6670.667
0.750.750.75
0.50.50.5