document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=856103>Question 856103</A>: <I><SPAN STYLE=\"word-break: break-all;\"> This is a question on my study guide for my test and I don't know how to solve this. If I can't figure this out, then I might fail my test. Please help me! I would greatly appreciate it.\r<BR>\n" );
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document.write( "The population of a local species of dragonfly can be found using an infinite geometric series where a1 = 36 and the common ratio is 1/2. Write the sum in sigma notation and calculate the sum that will be the upper limit of this population. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #515744 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=515744\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the sum of an infinite geometric series is equal to a1 / (1-r).<BR>\n" );
document.write( "r = 1/2<BR>\n" );
document.write( "a1 = 36<BR>\n" );
document.write( "sum is equal to 36 / (1 - 1/2) which is equal to 36/(1/2) which is equal to 72.<BR>\n" );
document.write( "that's your answer.<BR>\n" );
document.write( "the formula for the sum of a geometric series is normally shown as:<BR>\n" );
document.write( "Sn = A1 / (1-r)<BR>\n" );
document.write( "A1 is the first term in the sequence.<BR>\n" );
document.write( "Sn is the sum of all the terms.<BR>\n" );
document.write( "the following link discusses geometric series:<BR>\n" );
document.write( "<a  rel=nofollow HREF= \"http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut54d_geom.htm\" target = \"_blank\">http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut54d_geom.htm</a><BR>\n" );
document.write( "if you are not familiar with how they work, this is a good review.<BR>\n" );
document.write( "scroll down about 3/4 of the way down the page to get to sum of an infinite geometric series.\r<BR>\n" );
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