(x+1/x-1)-(x^2-2x/x^2-1)÷(x^2-x-2/x^2+2x+1)的结果
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解决时间 2021-01-03 01:19
- 提问者网友:鼻尖触碰
- 2021-01-02 19:00
(x+1/x-1)-(x^2-2x/x^2-1)÷(x^2-x-2/x^2+2x+1)的结果
最佳答案
- 五星知识达人网友:刀戟声无边
- 2021-01-10 05:10
原式=(x+1)/(x-1)-x(x-2)/(x+1)(x-1)÷(x-2)(x+1)/(x+1)²
=(x+1)/(x-1)-x(x-2)/(x+1)(x-1)×(x+1)/(x-2)
=(x+1)/(x-1)-x/(x-1)
=1/(x-1)
=(x+1)/(x-1)-x(x-2)/(x+1)(x-1)×(x+1)/(x-2)
=(x+1)/(x-1)-x/(x-1)
=1/(x-1)
全部回答
- 1楼网友:杯酒困英雄
- 2021-01-10 06:35
(x+1)(x-1)+2-2x
=x²-1+2-2x
=x²-2x+1
=(x-1)²
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