计算(1-1/2-1/3-1/4-1/5)(1/2+1/3+1/4+1/5+1/6)-(1-1/2-1/3-1&
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解决时间 2021-02-18 00:25
- 提问者网友:我们很暧昧
- 2021-02-17 15:13
计算(1-1/2-1/3-1/4-1/5)(1/2+1/3+1/4+1/5+1/6)-(1-1/2-1/3-1/4-1/5-1/6)(1/2+1/3+1/4+1
最佳答案
- 五星知识达人网友:煞尾
- 2021-02-17 16:41
原式=(1-1/2-1/3-1/4-1/5)*(1/2+1/3+1/4+1/5)+1/6*(1-1/2-1/3-1/4-1/5)
-(1-1/2-1/3-1/4-1/5)*(1/2+1/3+1/4+1/5)+1/6*(1/2+1/3+1/4+1/5)
=1/6*(1-1/2-1/3-1/4-1/5+1/2+1/3+1/4+1/5)
=1/6*1
=1/6
-(1-1/2-1/3-1/4-1/5)*(1/2+1/3+1/4+1/5)+1/6*(1/2+1/3+1/4+1/5)
=1/6*(1-1/2-1/3-1/4-1/5+1/2+1/3+1/4+1/5)
=1/6*1
=1/6
全部回答
- 1楼网友:煞尾
- 2021-02-17 17:25
设m=1/2+1/3+1/4+1/5
原式=(1-m)*(m+1/6)-(1-m-1/6)*m
=m-m*m+1/6-1/6*m-m+m*m+1/6*m
=1/6追问别人那复制的
原式=(1-m)*(m+1/6)-(1-m-1/6)*m
=m-m*m+1/6-1/6*m-m+m*m+1/6*m
=1/6追问别人那复制的
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