The problem

My aproach:

=

=

=

=

=

But according to the book the answer should be =

Mmm...-2 and -1 on the original problem should be exponents.

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- Apr 22nd 2009, 06:29 PM #1

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- Apr 22nd 2009, 06:34 PM #2

- Apr 22nd 2009, 06:45 PM #3

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- Apr 22nd 2009, 08:36 PM #4