SOLUTION: What is the numerical coefficient of the fourth term of (2x + 5y)^11?

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Question 1098183: What is the numerical coefficient of the fourth term of (2x + 5y)^11?
Answer by CubeyThePenguin(3113) About Me  (Show Source):
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Use the Binomial Theorem.

4th term: (11 choose 3) * (2x)^8 * (5y)^3

numerical coefficient: 165 * 256 * 125 = 5,280,000