document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=204928>Question 204928</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If you were given the third and the twenty-fifth terms of an arithmetic sequence how would you find the first term??????? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #154681 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=154681\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If you were given the third and the twenty-fifth terms of an arithmetic sequence how would you find the first term???????<BR>\n" );
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document.write( "a3 = a1 + 2d<BR>\n" );
document.write( "a25 = a1 + 24d<BR>\n" );
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document.write( "Subtract a3 from a25 to get:<BR>\n" );
document.write( "22d = a25 - a3<BR>\n" );
document.write( "d = (a25-a3)/22<BR>\n" );
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document.write( "Substitute that into a3 to solve for a1.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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