document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=193885>Question 193885</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the second term of the infinite geometric series, \r<BR>\n" );
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document.write( "a + ar + ar^2 + ar^3......\r<BR>\n" );
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document.write( "is eaqual to 4 and the same to infinity of this series is 18. Find the two possible values of the common ratio, r. what are the corresponding values of a? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #145562 by </B><A HREF=/tutors/aboutme.mpl?userid=radikrr><B>radikrr(7)</B></A><img src=\"/images/stars/stars-05.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=radikrr><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=145562\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ar=4    a/(1-r)=18<BR>\n" );
document.write( "a=4/r   4/r=(1-r)18\r<BR>\n" );
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document.write( "4/r=(1-r)18\r<BR>\n" );
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document.write( "2/9=(1-r)r\r<BR>\n" );
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document.write( "r^2-r+2/9=0<BR>\n" );
document.write( "D = 1-8/9=1/9\r<BR>\n" );
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document.write( "r1=2/3  r2=1/3<BR>\n" );
document.write( "a1=6    a2=18 </SPAN>\n" );
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