Question

FREE MEDAL!! Let f(x) = x2 - 16. Find f-1(x).

Answer 1

would it be the sqrt of x+16????

Answer 2

\[f(x) = 2x - 16\]
\[f^-1(x) = \frac{ 1 }{ 2x-16 }\]
\[= \frac{ 1 }{ 2(x-8) }\]

Answer 3

or
\[=\frac{ 1 }{ 2 }(x-8)^-1\]
depending on how your teacher/book prefers the answer be displayed

Answer 4

4square root of x
square root of x plus 16
x squared over 16
1 over quantity of x squared minus 16
those are the answer choices