document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1068729>Question 1068729</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How to calculate  the number of terms if the first term in an arithmetic series is 2 the last term is 20 and the sum of all terms is 110 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #683992 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=683992\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> sum=(n/2)(a1+an)<BR>\n" );
document.write( "110=(n/2)(2+20)<BR>\n" );
document.write( "220=22n<BR>\n" );
document.write( "n=10 ANSWER<BR>\n" );
document.write( "check<BR>\n" );
document.write( "a10=a1+9d<BR>\n" );
document.write( "20=2+9d<BR>\n" );
document.write( "9d=18<BR>\n" );
document.write( "d=2<BR>\n" );
document.write( "2,4,6,8,10,12,14,16,18,20<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );