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18和24設這兩個數是m,n這兩個的平方和是900,m^+n^=900也就是說這兩個自然數和30作為三角形三邊的時候這個三角形是直角三角形且30是斜邊.所以m,n,30是勾股數,且30>m,30>n.這樣,就把m,n的取值範圍縮小了很多30的約數...
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