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[几何] 求教一个恒过定点的题目

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lemondian posted 2017-10-8 18:34 |Read mode
QQ截图20171008183300.jpg

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kuing posted 2017-10-8 18:55
以前在人教论坛写过,是常规的代数计算,可惜现在上不了给不了链接了……

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original poster lemondian posted 2017-10-8 20:24
回复 2# kuing


    我试过,运算量特大,没什么信心算下去

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kuing posted 2017-10-8 21:23
回复 3# lemondian

幸好之前 isee 把我在人教论坛的过程转贴了过来
见:forum.php?mod=redirect&goto=findpost& … d=2623&pid=10490(12楼)
帖中还有不少相关东西,俺也没仔细看。

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original poster lemondian posted 2017-10-8 21:49
回复 4# kuing


  我初步看了一下,不得不佩服你的运算功力:
12楼有一个问题:如果有一条直线斜率不存在,另一条直线斜率=0,要不要考虑这种情况?

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色k posted 2017-10-8 22:50
回复 5# lemondian

要,我当时忘了提。

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