Here's the question you clicked on:
blahblah_who_cares
Simplify. i^-7 .
Well, \[ i^{-7} = \frac{1}{i^7} \] What first is \[ i^7 = ... \]
correct. Now what is 1/(-i)
oh wait. I think i know what i did wrong. its cause i forgot that i cannot be on the bottom of the equation. just to make sure. I believe the answer is i?
Yes, because you simplify complex fractions by multiplying by the conjugate of the denominator \[ \frac{1}{-i} = \frac{1}{-i}\frac{i}{i} = \frac{i}{1} = i \]