document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=634716>Question 634716</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me out in this sequence of finding r! Thank you so much! \r<BR>\n" );
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document.write( "Find r given a(sub 0) is -20. and a(sub 4) = -2500\r<BR>\n" );
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document.write( "Thank you for your time in helping me! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #399843 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=399843\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find r given a(sub 0) is -20. and a(sub 4) = -2500 <BR>\n" );
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document.write( "General Form: a(n) = a0*r^(n-1)<BR>\n" );
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document.write( "a(4) = (-20)*r^(3) = -2500<BR>\n" );
document.write( "r^3 = 125<BR>\n" );
document.write( "r = 5<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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