Answer
(a) $f^{-1}(17)=6.$
(b) $f(2)=3.$
Work Step by Step
Using the definition of the inverse function:
$f(x)=y\Leftrightarrow f^{-1}(y)=x$ we get by fillng up the missing gaps:
(a) $f(6)=17\Leftrightarrow f^{-1}(17)=6;$
(b) $f(2)=3\Leftrightarrow f^{-1}(3)=2.$
