00:01
So here we have 8 r to the 4th divided by 2r to the negative 4th.
00:08
Okay, so that that r to the negative 4th in the denominator, well, that's 1 over r to the 4th.
00:15
So the r to the 4th is going to move up to the numerator.
00:18
But be careful here that the exponent here, the negative 4, only affects the r.
00:25
Okay, it's not 2r to the negative 4th.
00:30
2r to the negative 4th, right? if i had the 2r that was in parentheses, then it would be the whole thing to the negative 4th, and the whole thing would then come upstairs.
00:42
But because there's no parentheses here, that exponent is affecting the r.
00:48
And then it's 2 times whatever r to the negative 4th is.
00:52
But r to negative 4th comes upstairs...