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August 9th, 2011, 12:27 PM   #1
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Simplify using index laws

Hi,

I am little confused by a sample problem within a book I'm working through.

The problem is to simplify using index laws:



and the answer the books gives is:



But I'm a little confused about the , I thought it should be because

Have I missed a step?

Thanks for any help provided.

P.S Apologies if my LaTex is a little off (first time I have used it)
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August 9th, 2011, 01:02 PM   #2
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Re: Simplify using index laws

We are given:

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