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LiNoob 发表于 2020-10-26 08:32
可以问一下怎么算的0.3吗 感谢🙏

integrate 3 p^2 (1-p) 2p dp from 0 to 1.

renyiryry 发表于 2020-10-21 11:21
应该是就这一个答案

That's not true. For example, one can try (6, 15). There are in fact infinite integer solutions to this question.