Functions and Inverses

Question

if f(7)=8, what’s f^-1(8)?

Answer 1

if f(x) = y then f^-1(y) = x

if f(7) = 8 then f^-1(8) = 7

the inverse just takes you back to where you started, start at x, then end at x

start at 7, then end at 7