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January 6th, 2011, 02:42 PM   #1
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Binomial Theorem question

Find the coefficient of in the expansion of
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January 6th, 2011, 03:08 PM   #2
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Re: Binomial Theorem question

First, use the binomial theorem to obtain the first three terms of each expansion:





Now, find the sum of the products of terms from each expansion where the sum of the exponents is 11:



Factor:



Combine within the parentheses:

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