why is "nCk + nCk-1" equal to " n+1Ck " ?
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Algebriacally, well Assume
Observe that (1)
so (i can do this since k/k = 1) (im using (1) )
multiply the first equation by to get both denominaters equals
which is n+1 C k.
Last edited by jakncoke; February 2nd 2013 at 12:06 AM.
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