document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=656507>Question 656507</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What are the next three termsand describe the pattern?<BR>\n" );
document.write( "-1, 2, -4, 8 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #409524 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=409524\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> What are the next three termsand describe the pattern?<BR>\n" );
document.write( "-1, 2, -4, 8<BR>\n" );
document.write( "----<BR>\n" );
document.write( "1st: -1<BR>\n" );
document.write( "2nd: -1*-2 = 2<BR>\n" );
document.write( "3rd: 2*-2 = -4<BR>\n" );
document.write( "4th: -4*-2 = 8<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "Pattern:<BR>\n" );
document.write( "a(1) = -1<BR>\n" );
document.write( "--<BR>\n" );
document.write( "a(n) = -2*a(n-1) for n = 2,3,4....<BR>\n" );
document.write( "========================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );