document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=898601>Question 898601</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Consider the sequence 3,9,15,__,57 and describe how you get the 4rd term after 15 and write a general formula given tn=_____\r<BR>\n" );
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document.write( "Please help out on how to do this I'm not sure which squence it is since its a grade 9 assignment </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #544928 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=544928\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 3,9,15,__,57<BR>\n" );
document.write( "This is an arithmetic sequence defined by the formula for the nth term in the sequence as<BR>\n" );
document.write( "Xn = a + d(n - 1) where a is the first term and d is the difference<BR>\n" );
document.write( "in our example a = 3 and d = 6 ( 9 - 3)<BR>\n" );
document.write( "now for the fourth term<BR>\n" );
document.write( "X4 = 3 + 6*(4 - 1)<BR>\n" );
document.write( "X4 = 3 + 18<BR>\n" );
document.write( "X4 = 21\r<BR>\n" );
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