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What is the coefficient of the term x7y in the expansion of (x + y)8?
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What is the coefficient of the term x7y in the expansion of (x + y)8?

User Noumenon
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The coefficient means the number before the unknown so 8(x+y) would equal 8x+8y so the coefficient would be 8 and for x7y the coefficient of x is 1 because there is nothing infront of it and the coefficient of y is 7 
User Yovanka
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