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4 bytes removed
, 08:05, 20 May 2015
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| </math> | | </math> |
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− | So when <math>a_k=0</math>, the binomial coefficient reads as <math>\binom{k-1}{k}</math> which is equals to since there are 0 ways to choose k items from k-1 items. | + | So when <math>a_k=0</math>, the binomial coefficient reads as <math>\binom{k-1}{k}</math> which equals 0 since there are 0 ways to choose k items from k-1 items. |
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| = Simple cases = | | = Simple cases = |