Question

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

Answer 1

function is not one to one and does not have an inverse

Answer 2

you can solve
\[x=y^2-16\] for \(y\) in two steps, but you will not get a function

Answer 3

\[x=y^2-16\\
x+16=y^2\\
\pm\sqrt{x+16}=y\]

Answer 4

the \(\pm\) tells you it is not a function

Answer 5

Thats what i just found out...thanks good sir!

Answer 6

@satellite73 is too smart for us
all hail satellite

Answer 7

The answer is sqrtx + 16 for future use