document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=314342>Question 314342</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I really need help on this one.\r<BR>\n" );
document.write( "\n" );
document.write( "a) The formula for the sum of the first 100 terms of 2, 4, 8, 16,... is________________________.\r<BR>\n" );
document.write( "\n" );
document.write( "b) The list in question \"a)\" above is called a/an_____________________sequence. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #224701 by </B><A HREF=/tutors/aboutme.mpl?userid=Jstrasner><B>Jstrasner(112)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Jstrasner><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=Jstrasner><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=224701\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a) The formula is : \r<BR>\n" );
document.write( "\n" );
document.write( "S(n)= (a(1-r^n))/(1-r)\r<BR>\n" );
document.write( "\n" );
document.write( "n is the number in the sequence<BR>\n" );
document.write( "a is the initial number <BR>\n" );
document.write( "r is the common ratio\r<BR>\n" );
document.write( "\n" );
document.write( "In this case the formula would be S(100)= (2(1-2^100))/(1-2)\r<BR>\n" );
document.write( "\n" );
document.write( "b) This list is called a \"geometric\" sequence </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );