Posted by Patty on Monday, May 21, 2012 at 11:10am.
That would be the sixth term.
For any positive integer n , the expansion of (x + y)n is C(n, 0)x n + C(n, 1)x n-1 y + C(n, 2)x n-2 y 2 + ... + C(n, n - 1)xy n-1 + C(n, n)y n .
Each term r in the expansion of (x + y)n is given by C(n, r - 1)x n-(r-1) y r-1 .
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