gaokao 2011 Q3

gaokao · China · shanghai-arts Composite & Inverse Functions Find or Apply an Inverse Function Formula

3. If the inverse function of $f(x) = 2x + 1$ is $f^{-1}(x)$, then $f^{-1}(-2) =$ $\_\_\_\_$

3. If the inverse function of $f(x) = 2x + 1$ is $f^{-1}(x)$, then $f^{-1}(-2) =$ $\_\_\_\_$\\