A*****d 发帖数: 82 | 1 m个正数中选出n个使A1 +A2+...+An+ A1xA2+ ...+ A1xAn+....+A(n-1)xAn+A1xA2xA3+.
..+A(n-2)xA(n-1)xAn+...+A1xA2x...xAn - S>0,求A1, A2, ...,An按(A1 +A2+..
.+An+ A1xA2+ ...+ A1xAn+....+A(n-1)xAn+A1xA2xA3+...+A(n-2)xA(n-1)xAn+...+
A1xA2x...xAn)的值降序数排列。 |
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