Suppose \(f(x)\) is an invertible function, and suppose that \(f(2)=f^{-1}(2)=4\).what is the value of \(f(f(2))\)?
\(f(2) = f^{-1}(2) = 4\\ \text{Take }f(\cdot) \text{ of both sides}\\ f(f(2)) = f(f^{-1}(2)) = 2\)
