计算: [(x+y)^2n]^4/(-x-y)^(2n)

问题描述:

计算: [(x+y)^2n]^4/(-x-y)^(2n)

[(x+y)^2n]^4/(-x-y)^(2n)
=[(x+y)^2n]^4/(x+y)^(2n)
=(x+y)^(8n)/(x+y)^(2n)
=(x+y)^4