Mathematics, 29.09.2019 04:20 Homepage10
What is the coefficient of x^8 y^2 in the expansion of (x + y)^10?
Answers: 1
is 
.
.
is known has a binomial coefficient and it can be compute by 
. The symbol 
stands for the factorial of 
, that is to say, Â 
then we can replace on the expression of the binomial theorem to obtain
, that is to say,
. We conclude that the coefficient we were looking for is 
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