I'm second guessing myself on Limits

[Ithina]

Homework Statement

Can [1 - (U^2/W^2)]^(-1/2) equal 0?

Homework Equations

I don't think the other equations are needed.. This is just a tangent of mine from last Physics' lecture.

The Attempt at a Solution

I set the (U/W)^2 part to infinity.
0 = 1 / sqrroot(1 - infinity)

which is:
0 = 1 / infinity*i

I know (1/infinity) goes to 0, but does the (i) change anything other than make it not real? I'm not worried if it's real or imaginary at the moment.

 

[Chewy0087]

you're right it is a bit different however as you see you could always just square both sides which shouldn't make a difference to the limits and you'll still see that it limits to 0 (from the negative)