document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=387127>Question 387127</A>: <I><SPAN STYLE=\"word-break: break-all;\"> write an algebraic expression that represents Sn for each expression and find the ninth term of each sequence:<BR>\n" );
document.write( "1.)  {12,6,3,1.5,..}<BR>\n" );
document.write( "2.)  {1/2,1/3,1/4,1/5,..}<BR>\n" );
document.write( "3.)  {1,-2,3,-4,..}<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #273655 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=273655\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1. S_n = 12*(1/2)^n, S_9 = 12*(1/2)^9 = 3/128\r<BR>\n" );
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document.write( "2. S_n = 1/(n+1), S_9 = 1/10\r<BR>\n" );
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document.write( "3. S_n = -n[(-1)^n], S_9 = 9 </SPAN>\n" );
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