document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1098042>Question 1098042</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the 4th term of an arithmetic progression is 7. the 2nd term is  (-1). find the first four terms of the sequence.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #712571 by </B><A HREF=/tutors/aboutme.mpl?userid=Jeetbhatt10th><B>Jeetbhatt10th(11)</B></A><img src=\"/images/stars/stars-06.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Jeetbhatt10th><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=Jeetbhatt10th><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=712571\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Which class do you study? You don't know so simple question<BR>\n" );
document.write( "a4=7=a+(4-1)d__(1)<BR>\n" );
document.write( "a2=-1=a+(2-1)d__(2)<BR>\n" );
document.write( "Subtracting  (2) from (1) we get<BR>\n" );
document.write( "7+1=3d-d<BR>\n" );
document.write( "8=2d<BR>\n" );
document.write( "d=4<BR>\n" );
document.write( "=>7=a+3d<BR>\n" );
document.write( "=>7=a+12<BR>\n" );
document.write( "=>a=-5<BR>\n" );
document.write( "A.P.:-5,-1,3,7,...<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );