Question

If f(x) =x2-6, find f-1 (x)

Answer 1

when getting the "inverse relation" of any expression, you'd always start off by doing a quick switcharoo on the variables, and then solve for "y", let's do so.


`\bf \stackrel{f(x)}{y}=x^2-6\qquad inverse\implies \boxed{x}=\boxed{y}^2-6 \\\\\\ x+6=y^2\implies √(x+6)=\stackrel{f^(-1)(x)}{y}`