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(3+2sqrt(2))^n的1的系数就是2y+1，但好像很难用的样子？

Posted by frkstyc at 2005-04-12 21:04:22 on Problem 1320

Followed by:

2x^2=y(y+1)=>(2y+1)^2-2(2x)^2=1 (0) frkstyc 2005-04-12 21:05:00
- done!no cheating,取共轭就好了 (0) frkstyc 2005-04-12 21:53:33

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