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

4square root of x

±square root of x plus 16

x squared over 16

1 over quantity of x squared minus 16
HELP

Question

Let f(x) = x2 - 16. Find f-1(x).

 4square root of x

 ±square root of x plus 16

 x squared over 16

 1 over quantity of x squared minus 16
HELP

anonymous · Answer

Is that suppose to be find the inverse? o-o

anonymous · Answer

I guess? thats all it said and it confused me

anonymous · Answer

Okay, Well to find the inverse, Switch the X and Y and solve for Y. c:

campbell_st · Answer

to find the inverse swap x and y

so 

$$x = y^2 - 16$$

now make y the subject 

then you have the inverse

cj49 · Answer

To find the inverse:
Replace f(x) with y
Switch x's and y's, so put x where y is and x where y is.
Solve for y
Replace y with f^-1(x)