Question

Please help me solve this problem Let f(x) = x2 − 16. Find f−1(x).



4 square root of x
± square root of x plus 16
x squared over 16
1 over quantity of x squared minus 16

Answer 1

it's f^{-1}(x) inverse
f(x) is same as y so you can write it as \[\huge\rm \color{red}{y}=\color{blue}{x}^2-16\]
to find inverse `switch x and y` \[\huge\rm \color{blue}{x}=\color{reD}{y}^2-16\]
now solve for y

Answer 2

can you solve for y?