Thread: f is one-to-one question

How would I solve this?

f(-12) = 7
f-1(7) = -12

and (f(-12))^-1= ______

How do I solve for (f(-12))^-1? woudn't it be -7?

Originally Posted by killasnake

How would I solve this?

f(-12) = 7
f-1(7) = -12

and (f(-12))^-1= ______

How do I solve for (f(-12))^-1? woudn't it be -7?

It seems you want,
f^(-1) (f(-12))
You know that,
f(-12)=7
And,
f^(-1)(7)=-12