Answer
$f^{-1}(17)=6$
$f(2)=3$
Work Step by Step
$\because f(6)=17, f^{-1}(f(6))=f^{-1}(17), f^{-1}(17)=6$
$\because f^{-1}(3)=2, f(f^{-1}(3))=f(2), f(2)=3$
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