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Binomial Theorem

  1. Oct 5, 2008 #1
    Use the Binomial Theorem to show that n summation k-0 3^k C(n,k) = 2^2n

    hint of the question is 3^k C(n,k) = 3^k 1^n-k C(n,k)
  2. jcsd
  3. Oct 5, 2008 #2


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    Think of applying the binomial theorem to the expansion of (1+3)^n.
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