document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1202472>Question 1202472</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find S9 of a geometric series if t1 = 2 and t6 = 486. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #837324 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=837324\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find S9 of a geometric series if t1 = 2 and t6 = 486.\r<BR>\n" );
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document.write( "tn = ar^(n-1)\r<BR>\n" );
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document.write( "n= number of terms<BR>\n" );
document.write( "a = first term\r<BR>\n" );
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document.write( "t1=2\r<BR>\n" );
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document.write( "t6 = 2*r^5= 486<BR>\n" );
document.write( "r^5 =243<BR>\n" );
document.write( "r=3\r<BR>\n" );
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document.write( "Sum of n terms =<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Sn+=+a%2A%281+-+r%5En%29+%2F+%281+-+r%29 ALIGN=MIDDLE  ALT=\"Sn+=+a%2A%281+-+r%5En%29+%2F+%281+-+r%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "S9 = 2*(1-3^9)/(1-3)\r<BR>\n" );
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document.write( "= 19682\r<BR>\n" );
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