document.write( "Question 1094794: State which is greater without evaluating A or B:
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Algebra.Com's Answer #709388 by ikleyn(52858)\"\" \"About 
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document.write( "A = 20000*(1+2+3+...+20001) = \"20000%2A%28%2820001%2A20002%29%2F2%29\" = \"%281%2F2%29%2A20000%2A20001%2A20002\".\r\n" );
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document.write( "B = 20001*(1+2+3+...+20000) = \"20001%2A%28%2820000%2A20001%29%2F2%29\" = \"%281%2F2%29%2A20000%2A20001%5E2\".\r\n" );
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document.write( "Now, comparing these expressions, you may conclude (without evaluating) that  A > B.\r\n" );
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document.write( "HINT.  I used well known formula for the sum of the first \"n\" natural numbers\r\n" );
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document.write( "          1 + 2 + 3 + . . . + n = \"%28n%2A%28n%2B1%29%29%2F2\".\r\n" );
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