document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=998587>Question 998587</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How can I find the sum of the first n multiples of 4? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #616350 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=616350\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The sum of an arithmetic series is found by<BR>\n" );
document.write( "Sn = (n/2)(a1 + an)<BR>\n" );
document.write( "Here an = 4n and a1 = 4, so<BR>\n" );
document.write( "Sn = (n/2)(4 + 4n) = n(2 + 2n) = 2n^2 + 2n </SPAN>\n" );
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