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Math Help - Counting Problems

  1. #1
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    Counting Problems

    Find the number of terms in the expansion of (x+y+z+2w)^12.
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  2. #2
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    Quote Originally Posted by LAURA.GOODMAN View Post
    Find the number of terms in the expansion of (x+y+z+2w)^12.
    any term is of type x^a.y^b.z^c.w^d
    constraint a+b+c+d = 12
    where each can take value for [0,12]

    Can you now solve it?

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