# Math Help - express inverse function

1. ## express inverse function

f(x)= √3-x. Find expression for f^-1(x).

My answer is x=√3-y, y≠ all real numbers ≥ 3

Is that correct?

Thanks

2. Originally Posted by live_laugh_luv27
f(x)= √3-x. Find expression for f^-1(x).

My answer is x=√3-y, y≠ all real numbers ≥ 3

Is that correct?

Thanks
is the function

$f(x) = \sqrt{3} - x$

or

$f(x) = \sqrt{3-x}$

?

3. sorry, I don't know how to type that on the computer

4. Originally Posted by live_laugh_luv27

sorry, I don't know how to type that on the computer
then you need to learn ... at least use parentheses as grouping symbols.

inverse ...

$y = \sqrt{3-x}$ , $x \le 3$

$x = \sqrt{3-y}$

$x^2 = 3-y$

$y = 3 - x^2$ , $x \ge 0$