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Counting with Generating Functions |
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e |
Recall that |
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e |
and therefore if |
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S = {a0 , a1 , a2 , a3
, ...} and
T = {b0 , b1 , b2 , b3
, ...} |
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there
will be a contribution of ambn to the m + n
power of x in the product of the generating functions for S and T.
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Example:
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