Consider f(x)=2xf(x) = 2^xf(x)=2x. Which of the following represents f−1(x)f^{-1}(x)f−1(x)?
f−1(x)=(1/2)xf^{-1}(x) = (1/2)^xf−1(x)=(1/2)x
f−1(x)=logx(2)f^{-1}(x) = \log_x(2)f−1(x)=logx(2)
f−1(x)=log2(x)f^{-1}(x) = \log_2(x)f−1(x)=log2(x)
f−1(x)=2−xf^{-1}(x) = 2^{-x}f−1(x)=2−x