Homework SourseWhat is the coefficient of x6y4 in the expansion of xy10 Wha
What is the coefficient of x^6y^4 in the expansion of (x+y)^10?
What is the coefficient of x^6y^4 in the expansion of (x+y)^10?
Solution
kth term of
(x+y)^n = nCk * x^(n-k) * y^k
to get the coefficient of x^6*y^4, put k=4
so coeffecient will be nCk = 10C4
= 210
Answer: 210
