document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=755216>Question 755216</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sn=n/2(2a +(n-1)d)<BR>\n" );
document.write( "a=2 and d=2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #459534 by </B><A HREF=/tutors/aboutme.mpl?userid=dkppathak><B>dkppathak(439)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=dkppathak><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=dkppathak><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=459534\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sn=n/2(2a +(n-1)d)  WHERE a=2 d=2<BR>\n" );
document.write( "Sn=n/2(2x2 +(n-1)2)<BR>\n" );
document.write( "     =n/2(4+2n-2)<BR>\n" );
document.write( "=n/2(2n+2)<BR>\n" );
document.write( "n/2x2(n+1)<BR>\n" );
document.write( "n(n+1)answer  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );