document.write( "Question 603569: What is the sum of 2+4+6+8+10+12 using the formula for the partial sum of arithmetic series? \n" ); document.write( "
Algebra.Com's Answer #380747 by jim_thompson5910(35256)![]() ![]() ![]() You can put this solution on YOUR website! S = (n*(a1 + an))/2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "S = (6*(2+12))/2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "S = 6*14/2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "S = 84/2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "S = 42\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So 2+4+6+8+10+12 = 42 \n" ); document.write( " |