SOLUTION: Find the coefficient of x17y3 from the expression (x + y)20

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Question 620119: Find the coefficient of x17y3 from the expression (x + y)20
Answer by ewatrrr(24785) About Me  (Show Source):
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Hi,

Find the coefficient of x%5E17y%5E%28highlight%283%29%29 from the expression+%28x+%2B+y%29%5E%28highlight%2820%29%29  coefficient is 20C3 = 1140