document.write( "Question 847803: The sum of the first 5 terms of 3+7+11+...is \n" ); document.write( "
Algebra.Com's Answer #513627 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! add 4 to the last term \n" ); document.write( "3,7,11,15,19 \n" ); document.write( "S = ½(2a + d(n-1))n \n" ); document.write( "S = ½(2*3 + 4(4))5 \n" ); document.write( "S = ½(6 + 16)5 \n" ); document.write( "S = 11*5 \n" ); document.write( "s=55\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |