document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1047684>Question 1047684</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The first two terms of an arithmetic sequnce are 3, 7 and the last term is 355.\r<BR>\n" );
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document.write( "a. How many terms are there?\r<BR>\n" );
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document.write( "b. What is the 40th term?\r<BR>\n" );
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document.write( "c. What is the sum of the series?\r<BR>\n" );
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document.write( "Thanks in advance for helping out! I understand the concept but am having difficulty in solving this problem.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #663220 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=663220\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Note the description is Arithmetic Progression, and you are given first two terms, meaning these are the two CONSECUTIVE terms.   <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7-3=4 ALIGN=MIDDLE  ALT=\"7-3=4\"   DISABLED_style= \"max-width:90%; height:auto;\" >, common difference.  General term of the sequence,  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%2B%28n-1%29%2A4=highlight%283%2B4%28n-1%29%29 ALIGN=MIDDLE  ALT=\"3%2B%28n-1%29%2A4=highlight%283%2B4%28n-1%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "(a) and (b) should be very simple now.<BR>\n" );
document.write( "(c) ? If you know how many terms in the sequence, call this v, then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28v%2F2%29%28firstTerm%2BlastTerm%29 ALIGN=MIDDLE  ALT=\"%28v%2F2%29%28firstTerm%2BlastTerm%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >  is the sum of the finite sequence. </SPAN>\n" );
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