document.write( "Question 252126: show that 3^2008+4^2009 can be written as product of two positive integers each of which is larger than 2009^182. \n" ); document.write( "
Algebra.Com's Answer #183923 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
Note: The tutor \"drk\" did not show that
\n" ); document.write( "3^2008[1 +3*(4/3)^2009] is the product of two integers. In fact
\n" ); document.write( "[1 +3*(4/3)^2009] is not an integer!!!
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\n" ); document.write( "\n" ); document.write( "show that 3^2008+4^2009 can be written as product of two positive integers each of which is larger than 2009^182.
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document.write( "We use the fact that\r\n" );
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document.write( "\"3%5E2008%2B4%5E2009=3%5E2008%2B4%2A4%2A2008=%283%5E502%29%5E4%2B4%284%5E502%29\"\r\n" );
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document.write( "We let \"x=3%5E502\" and \"y+=4%5E502\"\r\n" );
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document.write( "Then\r\n" );
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document.write( "Substituting back for \"x\" and \"y\"\r\n" );
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document.write( "\"%28x%5E2-2xy%2B2y%5E2%29%28x%5E2%2B2xy%2B2y%5E2%29\"\r\n" );
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document.write( "  \r\n" );
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document.write( "So this is the product of two very large integers. So we have\r\n" );
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document.write( "shown the first part.\r\n" );
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document.write( "Now we only need to show that the smaller of these, which is\r\n" );
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document.write( "\"3%5E1004-2%2A3%5E502%2A4%5E502%2B2%2A4%5E1004\"\r\n" );
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document.write( "is greater than \"2009%5E182\".\r\n" );
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document.write( "I have figured out how to do this yet, but I'm working on it.\r\n" );
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document.write( "If and when I get it then I'll post it here.\r\n" );
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document.write( "Edwin
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