document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=855046>Question 855046</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is Sn of the geometric series with a1=4, an=256, and n=4?\r<BR>\n" );
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document.write( "A)84<BR>\n" );
document.write( "B) 336<BR>\n" );
document.write( "C) 340<BR>\n" );
document.write( "D)260 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #515042 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=515042\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> First we need to find the ratio<BR>\n" );
document.write( "Tn = t * r^(n - 1)<BR>\n" );
document.write( "256 = 4 * r^(3)<BR>\n" );
document.write( "r=4\r<BR>\n" );
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document.write( "S=t*(1 - r^n)/(1 - r)<BR>\n" );
document.write( "S=4*(1 - 4^4)/(1 - 4)=340\r<BR>\n" );
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document.write( "C) 340 </SPAN>\n" );
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