document.write( "Question 504901: Let X represent the sum of the integers between 1 and 300, inclusive, and let Y represent the sum of the integers between 250 and 300, inclusive. Compute X-Y. \n" ); document.write( "
Algebra.Com's Answer #339730 by richard1234(7193)![]() ![]() You can put this solution on YOUR website! X-Y = (1+2+...+300) - (250+251+...300) The 250, 251, ...300 all cancel, leaving\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "X-Y = 1+2+...+249 = 249*250/2 = 31125 \n" ); document.write( " |