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# How do i work this out watch

1. http://prntscr.com/b3obc9.

An explanation would be nice rather than just an answer.

I know anything to the power of 1/2 is square root but that's about it.

2. 1. I used the fact that
2. Then I used the fact that

3. (Original post by junayd1998)
http://prntscr.com/b3obc9.

An explanation would be nice rather than just an answer.

I know anything to the power of 1/2 is square root but that's about it.
Okay, so .

So:
4. (Original post by Zacken)
Okay, so .

So:

http://prntscr.com/b3orak

Also what about if it was to the power of positive 1/2?
5. (Original post by junayd1998)
http://prntscr.com/b3orak

Also what about if it was to the power of positive 1/2?
wqe
6. (Original post by junayd1998)
http://prntscr.com/b3orak

Also what about if it was to the power of positive 1/2?
That's correct.

If it was to the power of a positive half then we wouldn't have flipped the fraction over in the first step so the answer would be the reciprocal of what you have now.

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