Question

SAT subject test question:
( I will post it below)

Answer 1

If \[f(x) = 3^{x} \] for all real values of x and \[f ^{-1}(n) = -2\] then n=?
a)-9
b)-6
c)\[\sqrt[3]{2}\]
d)1/9
e)9

Answer 2

\[f^{-1}(n)=-2\implies n=f(-2)\]

Answer 3

and \(f(x)=3^x\) so \(f(-2)=3^{-2}=\frac{1}{3^2}\)