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Re:这题我就输出那一句总可以碰对的吧

Posted by 20053565 at 2007-07-18 21:14:20 on Problem 3207
In Reply To:这题我就输出那一句总可以碰对的吧 Posted by:newbgirl at 2007-06-19 19:50:21
....(1/2)^n

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