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[几何] 编了个题目，不知道有没有问题－同事王编的

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realnumber Posted 2014-5-14 11:53 |Read mode

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等待hxh Posted 2014-5-14 13:30

题目没错，离心率为2，直接计算即可，或者特殊值代入亦可！

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其妙 Posted 2014-5-14 13:55

这是e=2的一个美妙性质。

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