document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=972330>Question 972330</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find the sum of the first nine terms of the geometric sequence: 8,-16,32,-64,128,...<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #594735 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=594735\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> common ration <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-2 ALIGN=MIDDLE  ALT=\"-2\"   DISABLED_style= \"max-width:90%; height:auto;\" >, first term, 8.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "You can look for the formula in a textbook or a reference manual:\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The sum of the first n terms of geometric sequence, common ratio r, first term <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%5B1%5D ALIGN=MIDDLE  ALT=\"A%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > is:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%5B1%5D%28%281-r%5En%29%2F%281-r%29%29 ALIGN=MIDDLE  ALT=\"A%5B1%5D%28%281-r%5En%29%2F%281-r%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Your series,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8%28%281-%28-2%29%5E9%29%2F%281-%28-2%29%29%29 ALIGN=MIDDLE  ALT=\"8%28%281-%28-2%29%5E9%29%2F%281-%28-2%29%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >------simplify. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );