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Re:看了前面大虾们的证明，我知道了是求完全平方数的个数，可是为什么直接开方就可以了呢？In Reply To:看了前面大虾们的证明，我知道了是求完全平方数的个数，可是为什么直接开方就可以了呢？ Posted by:swordspirit at 2009-07-30 17:50:58 > rt 囧，偶想明白了。 假设有一正方形网格，边上标上1，2，3，4，5。。。则对角线上元素即为完全平方数，由图得如题结论。。。 Followed by: Post your reply here: |
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