document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=701596>Question 701596</A>: <I><SPAN STYLE=\"word-break: break-all;\"> determine the first three terms of the arithmetic progression of which : <BR>\n" );
document.write( "the 4th term is -13 and the 7th term is -25 \r<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 #432474 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=432474\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  determine the first three terms of the arithmetic progression of which : <BR>\n" );
document.write( "the 4th term is -13 and the 7th term is -25 <BR>\n" );
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document.write( "Equations:<BR>\n" );
document.write( "a + 3d = -13<BR>\n" );
document.write( "a + 6d = -25<BR>\n" );
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document.write( "Subtract and solve for \"d\":<BR>\n" );
document.write( "3d  -12<BR>\n" );
document.write( "d = -4<BR>\n" );
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document.write( "Solve for \"a\":<BR>\n" );
document.write( "a + 3d = -13<BR>\n" );
document.write( "a + 3*-4 = -13<BR>\n" );
document.write( "a = -1<BR>\n" );
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document.write( "1st 4 terms: -1, -1+-4 = -5 ; -5+-4 = -9<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "==================== </SPAN>\n" );
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