document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=989971>Question 989971</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 2+4+6....+42 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #610118 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52834)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=610118\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "Arithmetic progression.<BR>\n" );
document.write( "First term is 2.<BR>\n" );
document.write( "The common difference is 2.<BR>\n" );
document.write( "The number of terms is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2842-2%29%2F2+%2B+1 ALIGN=MIDDLE  ALT=\"%2842-2%29%2F2+%2B+1\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 21.\r<BR>\n" );
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document.write( "Use the formula for the sum (see the lesson <A  rel=nofollow HREF=http://www.algebra.com/algebra/homework/Sequences-and-series/Arithmetic-progressions.lesson>Arithmetic progressions</A> in this site)\r<BR>\n" );
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document.write( "S = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%28a%5B1%5D%2Ba%5Bn%5D%29%2F2%29 ALIGN=MIDDLE  ALT=\"%28%28a%5B1%5D%2Ba%5Bn%5D%29%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n ALIGN=MIDDLE  ALT=\"n\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%282+%2B+42%29%2F2%29 ALIGN=MIDDLE  ALT=\"%28%282+%2B+42%29%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=21 ALIGN=MIDDLE  ALT=\"21\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=44%2F2 ALIGN=MIDDLE  ALT=\"44%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=21 ALIGN=MIDDLE  ALT=\"21\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 22*21 = 462.\r<BR>\n" );
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