document.write( "Question 648576: What is the largest number which is the product of positive integers whose sum is 2005? \n" ); document.write( "
Algebra.Com's Answer #406739 by swincher4391(1107)![]() ![]() You can put this solution on YOUR website! Let x and y be positive integers.\r \n" ); document.write( "\n" ); document.write( "Then let x*y be maximized by x+y = 2005\r \n" ); document.write( "\n" ); document.write( "In general, the closer you get to a square, the larger the product will be. We can either use this fact, or we can make a table. I'll leave you to make a table if you want. Knowing that 2005 is odd, x and y can differ by at most one. \r \n" ); document.write( "\n" ); document.write( "x + x+1 = 2005\r \n" ); document.write( "\n" ); document.write( "2x = 2004\r \n" ); document.write( "\n" ); document.write( "x = 1002\r \n" ); document.write( "\n" ); document.write( "(1002+1) is the other. \r \n" ); document.write( "\n" ); document.write( "Then 1002 and 1003 are the two integers.\r \n" ); document.write( "\n" ); document.write( "Their product is 1005006. \n" ); document.write( " |