超难数学题(那位大哥大姐帮个忙.)1.已知三个方程构成的方程组xy-2y-3x=0,yz-3z-5y=0,xz-5x-2z=0,恰有一组非零解,则()的平方=…2.已知a、b、c都是整数,且a+b+c被除7余1;a+2b+4c被7除余2;2a-b+2c被7
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![超难数学题(那位大哥大姐帮个忙.)1.已知三个方程构成的方程组xy-2y-3x=0,yz-3z-5y=0,xz-5x-2z=0,恰有一组非零解,则()的平方=…2.已知a、b、c都是整数,且a+b+c被除7余1;a+2b+4c被7除余2;2a-b+2c被7](/uploads/image/z/4099528-64-8.jpg?t=%E8%B6%85%E9%9A%BE%E6%95%B0%E5%AD%A6%E9%A2%98%EF%BC%88%E9%82%A3%E4%BD%8D%E5%A4%A7%E5%93%A5%E5%A4%A7%E5%A7%90%E5%B8%AE%E4%B8%AA%E5%BF%99.%EF%BC%891.%E5%B7%B2%E7%9F%A5%E4%B8%89%E4%B8%AA%E6%96%B9%E7%A8%8B%E6%9E%84%E6%88%90%E7%9A%84%E6%96%B9%E7%A8%8B%E7%BB%84xy-2y-3x%3D0%2Cyz-3z-5y%3D0%2Cxz-5x-2z%3D0%2C%E6%81%B0%E6%9C%89%E4%B8%80%E7%BB%84%E9%9D%9E%E9%9B%B6%E8%A7%A3%2C%E5%88%99%EF%BC%88%EF%BC%89%E7%9A%84%E5%B9%B3%E6%96%B9%3D%E2%80%A62.%E5%B7%B2%E7%9F%A5a%E3%80%81b%E3%80%81c%E9%83%BD%E6%98%AF%E6%95%B4%E6%95%B0%2C%E4%B8%94a%2Bb%2Bc%E8%A2%AB%E9%99%A47%E4%BD%991%EF%BC%9Ba%2B2b%2B4c%E8%A2%AB7%E9%99%A4%E4%BD%992%EF%BC%9B2a-b%2B2c%E8%A2%AB7)
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