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题目没有问题,仔细读题吧

Posted by ACM06Louty at 2008-09-30 09:15:58
In Reply To:1007 Posted by:blue_mary at 2008-09-30 09:12:30
> x1*x2*x3*…*xi*…*xn≠0 ??
> should be ... x1+x2+x3+…+xi+…+xn≠0 ??

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