document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=976757>Question 976757</A>: <I><SPAN STYLE=\"word-break: break-all;\"> S25, when a1 = 32 and d = -1 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #598589 by </B><A HREF=/tutors/aboutme.mpl?userid=Cromlix><B>Cromlix(4381)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cromlix><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=Cromlix><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=598589\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a(n) = a(1) + (n - 1) d<BR>\n" );
document.write( "a(25) = 32 + (25 - 1) -1<BR>\n" );
document.write( "a(25) = 8<BR>\n" );
document.write( "S(n) = [n(a(1) + a(n)]/2<BR>\n" );
document.write( "S(25) = [25(32 + 8)]/2<BR>\n" );
document.write( "S(25) = 520<BR>\n" );
document.write( "Hope this helps:-) </SPAN>\n" );
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