document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1140694>Question 1140694</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the sum of the arithmetic sequence.<BR>\n" );
document.write( " 251, 249, 247, 245, ..., 233 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #761210 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=761210\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the sum of the arithmetic sequence.<BR>\n" );
document.write( " 251, 249, 247, 245, ..., 233<BR>\n" );
document.write( "solution<BR>\n" );
document.write( "a=251  d=249-251=-2   last term=233<BR>\n" );
document.write( "last term=a+(n-1)d<BR>\n" );
document.write( "233=251+(n-1)x-2<BR>\n" );
document.write( "233-251=-2(n-1)<BR>\n" );
document.write( "-18=-2(n-1)<BR>\n" );
document.write( "n-1=9<BR>\n" );
document.write( "n=10<BR>\n" );
document.write( "sum=10(251+233)/2<BR>\n" );
document.write( "  =10x484/2<BR>\n" );
document.write( "10x242=2420<BR>\n" );
document.write( "answer 2420 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );