若x=2010,y=2011,则(x+y)×x的4次方减y的4次方分之x²+y²等于多少

2025-01-04 03:28:33
推荐回答(1个)
回答1:

(x+y)*(x^2+y^2)/(x^4-y^4)
=(x+y)*(x^2+y^2/(x^2+y^2)(x+y)(x-y)
=1/(x-y)
=1/(2010-2011)
=-1