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var title_126250='Re:请教高手一些排列组合题目~~...';
var body_126250='第五题是6。1的6次方，2的5次方，3的4次方，4的3次方，5的2次方，6的1次方，7的0次方。<br>第六题是1707。3*7-5＝16，16*7-5＝107　107*16-5＝1707<br>';
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