Thread: Inverse Function

Is the inverse of f(x) = 9-2x^2
f-1(x) = -sqrt( (9/2) - (x/2) )

Thanks,
D.

Originally Posted by dboyd435

Is the inverse of f(x) = 9-2x^2
f-1(x) = -sqrt( (9/2) - (x/2) )

Thanks,
D.

The working in your post is correct except I do not see why you can't have a plus or minus infront of that square root unless there is something about the domain you're not telling me











Bear in mind that's not a function since it's not one to one - the domain would have to be restricted to make it a function. t

Thanks, ya, I meant to put +/- but i guess it didn't type out for some reason.