Let f(x)=12x+1f(x) = \frac{1}{2^x + 1}f(x)=2x+11. Find the inverse function f−1(x)f^{-1}(x)f−1(x).
log2(1−xx)\log_2(\frac{1-x}{x})log2(x1−x)
log2(x1−x)\log_2(\frac{x}{1-x})log2(1−xx)
ln(1−xx)\ln(\frac{1-x}{x})ln(x1−x)
21−xx2^{\frac{1-x}{x}}2x1−x