document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1026504>Question 1026504</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do I put -13+(-26)+(-39)+(-52)+(-65)+(-78) into sigma notątion? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #641748 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=641748\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Arithmetic progression, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-13%2B%28-13%29%28n-1%29 ALIGN=MIDDLE  ALT=\"-13%2B%28-13%29%28n-1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.  Index of each term is n.  Simplify the general term if wanted,  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-13-13n%2B13=-13n ALIGN=MIDDLE  ALT=\"-13-13n%2B13=-13n\"   DISABLED_style= \"max-width:90%; height:auto;\" >.  Your summation uses 6 terms, from index 1 to 6.\r<BR>\n" );
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