√2/(√2-1)
答案:3 悬赏:30
解决时间 2021-01-25 03:10
- 提问者网友:
- 2021-01-24 10:01
√2/(√2-1)
最佳答案
- 二级知识专家网友:人间朝暮
- 2021-01-24 10:57
√2/(√2-1)
=[√2*(√2+1)]/[(√2-1)*(√2+1)]
=(2+√2)/(2-1)
=2+√2
肯定对
=[√2*(√2+1)]/[(√2-1)*(√2+1)]
=(2+√2)/(2-1)
=2+√2
肯定对
全部回答
- 1楼网友:纵马山川剑自提
- 2021-01-24 12:20
上下同乘以√2 +1
原式=√2(√2+1)/(√2+1)(√2-1)
=2-√2
原式=√2(√2+1)/(√2+1)(√2-1)
=2-√2
- 2楼网友:旧脸谱
- 2021-01-24 11:21
分子分母同乘上:根2+1
√2/(√2-1)
=根2*(根2+1)/[(根2-1)(根2+1)]
=(2+根2)/(2-1)
=2+根2
√2/(√2-1)
=根2*(根2+1)/[(根2-1)(根2+1)]
=(2+根2)/(2-1)
=2+根2
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