1-(1-1/1-x)2÷【（x2-x+1）/x2-2x+1】
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解决时间 2021-02-24 05:18
- 提问者网友：缘字诀
- 2021-02-23 13:10
1-(1-1/1-x)2÷【（x2-x+1）/x2-2x+1】
最佳答案
- 五星知识达人网友：未来江山和你
- 2021-02-23 14:48
1-(1-1/1-x)2÷【（x2-x+1）/x2-2x+1】
=1-(1-x-1)²/(1-x)²×[(x²-x+1)/(x-1)²]
=1-[x²/(x²-x+1)]
=(x²-x+1-x²)/(x²-x+1)
=(1-x)/(x²-x+1)
=1-(1-x-1)²/(1-x)²×[(x²-x+1)/(x-1)²]
=1-[x²/(x²-x+1)]
=(x²-x+1-x²)/(x²-x+1)
=(1-x)/(x²-x+1)
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