Homework Help: Math

Posted by Gina on Thursday, November 23, 2006 at 7:35pm.

^=exponents
/= divide

So I am not sure how to do this. It is an example in my book but I still dont get it. Can you work through ti so I can do my real work.

(-1^2+-1^-2)^-1

(-1^2+-1^-2)^-1 =
First, do work within the parentheses.
-1*-1 = 1 and -1^-2 = 1/(-1²) =
[1+(1/(-1²)]= [1 + 1/1]^-1. (One moves the negative exponent in the numerator by making it 1/(the positive exponent; thus, -1^-2 becomes 1/(-1)².
Now flip the -1 exponent by taking the reciprocal.
[1/(1+1}] = 1/2
<Check my thinking. Check my arithmetic. There are so many exponents and negative exponents that it is easy to make a mistake. Furthermore, when I try to do the exponents it is easy to forget to turn the exponents off. I hope this turns out ok.

It looks ok but check my work anyway.

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