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)\"\" \"About 
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( "
\n" );