问题标题:
(x-x²-1/1-x)·x²-2x+1/x²-x+1求值.(x-x²-1/1-x)·x²-2x+1/x²-x+1
问题描述:
(x-x²-1/1-x)·x²-2x+1/x²-x+1
求值.(x-x²-1/1-x)·x²-2x+1/x²-x+1
董小锋回答:
(x-x²-1/1-x)·x²-2x+1/x²-x+1
=(x-x²-1/x²-x+1)·x²-2x+1/(1-x)
=-1*(1-x)
=x-1
点击显示
数学推荐
热门数学推荐