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Math Help - Finding Simple Expressions....

  1. #1
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    Finding Simple Expressions....

    Question : Find a simple expression for :

    n
    Σ k. 2^k . ( n C K )
    k=1

    Thanks in advance.

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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by aamiri View Post
    Question : Find a simple expression for :

    n
    Σ k. 2^k . ( n C K )
    k=1

    Thanks in advance.


    Consider using a binomial expansion on:

    f(x)=x\dfrac{d}{dx}(1+x)^n

    CB
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