document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=978613>Question 978613</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given the geometric sequence: 20,(5/2),(5/16)  ...  \r<BR>\n" );
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document.write( "Find an explicit formula for a_n. <BR>\n" );
document.write( "a_n =        \r<BR>\n" );
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document.write( "Find a_(8) =  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #599979 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=599979\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hi there,<BR>\n" );
document.write( "20,(5/2),(5/16) ... <BR>\n" );
document.write( "Find 'r' Using 1st and 2nd numbers<BR>\n" );
document.write( "5/2 / 20 = 5/40 = 1/8<BR>\n" );
document.write( "An = 20* (1/8)^n-1<BR>\n" );
document.write( "A(8) = 20*(1/8)^7<BR>\n" );
document.write( "A^8 = 5/524288<BR>\n" );
document.write( "Hope this helps:-) </SPAN>\n" );
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