直线
,
之间距离为
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd0587ac524b3ce92dc565feca6607a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b61243c0ec83961786cd6b4cd611100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
更新时间:2021-11-23 21:46:55
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【知识点】 由距离求已知直线的平行线
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【推荐2】已知直线l1:x+y-1=0,l2:x+y+a=0,且两直线间的距离为
,则a=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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