document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=149402>Question 149402</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how do you figure out the nth term of :<BR>\n" );
document.write( "21,19,17,15...<BR>\n" );
document.write( "please help!!! xxx<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 #109616 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=109616\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> how do you figure out the nth term of :<BR>\n" );
document.write( "21,19,17,15...<BR>\n" );
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document.write( "Line the numbers up with 1,2,3,4...<BR>\n" );
document.write( "1----21<BR>\n" );
document.write( "2----21-1*2<BR>\n" );
document.write( "3----21-2*2<BR>\n" );
document.write( "4----21-3*2<BR>\n" );
document.write( "...<BR>\n" );
document.write( "n....21-(n-1)2 = 21-(2n-2)=21-2n+2 = 23-2n<BR>\n" );
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document.write( "The nth term is a(n) = 23-2n<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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