document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=988822>Question 988822</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the sum of the geometric sequence –3, 15, –75, 375, … when there are 7 terms <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #609296 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=609296\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the sum of the geometric sequence –3, 15, –75, 375, … when there are 7 terms <BR>\n" );
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document.write( "a(1) = -3<BR>\n" );
document.write( "r = 15/(-3) = -5<BR>\n" );
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document.write( "Sum = (-3)[(-5)^7 -1)/(-3-1)] = -3[(-78125 -1)/(-4)] = (3/4)(-78126) = -58594.5<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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