document.write( "Question 1210348: x, y, z ∈ Z³
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Algebra.Com's Answer #851999 by AnlytcPhil(1806)\"\" \"About 
You can put this solution on YOUR website!
1210348
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document.write( "I kept on using the same technique, trying powers of 2 for x and y and\r\n" );
document.write( "found all these solutions, and corrected the one I mis-punched my\r\n" );
document.write( "calculator on.\r\n" );
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document.write( "\"13%5E%22%22%2F%28%22%22+%2B-+1%29%5E2\"\"%22%22%2B%22%22\"\"1996%5E%22%22%2F%28%22%22+%2B-+1%29%5E2\"\"%22%22=%22%22\"\"1422464%5E%22%22%2F1997%5E%22%22\"\"%22%22=%22%22\"\"2009\"\r\n" );
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document.write( "(x,y,z) = (1,1,1422464), (1,-1,1422464), (-1,1,1422464), (-1,-1,1422464).\r\n" );
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document.write( "These others give 4 solutions in the same way: \r\n" );
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document.write( "\"13%5E%22%22%2F%28%22%22+%2B-+1%29%5E2\"\"%22%22%2B%22%22\"\"1996%5E%22%22%2F%28%22%22+%2B-+2%29%5E2\"\"%22%22=%22%22\"\"1022464%5E%22%22%2F1997%5E%22%22\"\"%22%22=%22%22\"\"512\"\"%22%22=%22%22\"\"2%5E9+\"\r\n" );
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document.write( "\"13%5E%22%22%2F%28%22%22+%2B-+2%29%5E2\"\"%22%22%2B%22%22\"\"1996%5E%22%22%2F%28%22%22+%2B-+4%29%5E2\"\"%22%22=%22%22\"\"255616%5E%22%22%2F1997%5E%22%22\"\"%22%22=%22%22\"\"128\"\"%22%22=%22%22\"\"2%5E7\"\r\n" );
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document.write( "\"13%5E%22%22%2F%28%22%22+%2B-+4%29%5E2\"\"%22%22%2B%22%22\"\"1996%5E%22%22%2F%28%22%22+%2B-+8%29%5E2\"\"%22%22=%22%22\"\"63904%5E%22%22%2F1997%5E%22%22\"\"%22%22=%22%22\"\"32\"\"%22%22=%22%22\"\"2%5E5\"\r\n" );
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document.write( "\"13%5E%22%22%2F%28%22%22+%2B-+8%29%5E2\"\"%22%22%2B%22%22\"\"1996%5E%22%22%2F%28%22%22+%2B-+16%29%5E2\"\"%22%22=%22%22\"\"15976%5E%22%22%2F1997%5E%22%22\"\"%22%22=%22%22\"\"8\"\"%22%22=%22%22\"\"2%5E3\"\r\n" );
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document.write( "\"13%5E%22%22%2F%28%22%22+%2B-+16%29%5E2\"\"%22%22%2B%22%22\"\"1996%5E%22%22%2F%28%22%22+%2B-+32%29%5E2\"\"%22%22=%22%22\"\"1996%5E%22%22%2F1997%5E%22%22\"\"%22%22=%22%22\"\"2\"\"%22%22=%22%22\"\"2%5E1\"\r\n" );
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document.write( "So, except for the 1st solution above, we could generalize on the others this\r\n" );
document.write( "way.  Maybe Ikleyn can prove this generalization for them:\r\n" );
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document.write( "\"13%5E%22%22%2F%28%22%22+%2B-+2%5En%29%5E2\"\"%22%22%2B%22%22\"\"1996%5E%22%22%2F%28%22%22+%2B-+2%5E%28n%2B1%29%29%5E2\"\"%22%22=%22%22\"\"%281997%2A2%5E%289-2n%29%5E%22%22%29%2F%281997%5E%22%22%5E%22%22%29\"\"%22%22=%22%22\"\"2%5E%289-2n%29%29+\" \r\n" );
document.write( "for n = 0,1,2,3,4 \r\n" );
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document.write( "But I'm still not sure there are any other solutions. I said I was sure I had\r\n" );
document.write( "all of them before, and then found these and had to eat my words. LOL\r\n" );
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document.write( "Edwin
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