document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1035874>Question 1035874</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the sum of the first 22 terms in the arithmetic series -6 - 12 - 18 - ...\r<BR>\n" );
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document.write( "-1,260<BR>\n" );
document.write( "-1,518<BR>\n" );
document.write( "-1,386<BR>\n" );
document.write( "-1,584 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #650495 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52786)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=650495\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the sum of the first 22 terms in the arithmetic series -6 - 12 - 18 - ...\r<BR>\n" );
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document.write( "-1,260<BR>\n" );
document.write( "-1,518<BR>\n" );
document.write( "-1,386<BR>\n" );
document.write( "-1,584<BR>\n" );
document.write( "~~~~~~~~~~~~~~~~~~~~~~~~~\r<BR>\n" );
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document.write( "Use the formula for the sum of the first n terms of an arithmetic progression \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S%5Bn%5D ALIGN=MIDDLE  ALT=\"S%5Bn%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > = &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5B1%5D+%2B+a%5B2%5D+%2B+a%5B3%5D+%2B+ellipsis+%2B+a%5Bn%5D ALIGN=MIDDLE  ALT=\"a%5B1%5D+%2B+a%5B2%5D+%2B+a%5B3%5D+%2B+ellipsis+%2B+a%5Bn%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28a%5B1%5D+%2B+%28n-1%29%2Ad%2F2%29%2An ALIGN=MIDDLE  ALT=\"%28a%5B1%5D+%2B+%28n-1%29%2Ad%2F2%29%2An\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "where <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5B1%5D ALIGN=MIDDLE  ALT=\"a%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the first term, d is the common difference and n is the number of terms (see the lesson <A  rel=nofollow HREF=https://www.algebra.com/algebra/homework/Sequences-and-series/Arithmetic-progressions.lesson>Arithmetic progressions</A> in this site).\r<BR>\n" );
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document.write( "In your case <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5B1%5D ALIGN=MIDDLE  ALT=\"a%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > = -6, d = -6, n = 22.\r<BR>\n" );
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document.write( "Plug in this data in the formula and get\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S%5B22%5D ALIGN=MIDDLE  ALT=\"S%5B22%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-6+%2B+%2821%2A%28-6%29%29%2F2%29%2A22 ALIGN=MIDDLE  ALT=\"%28-6+%2B+%2821%2A%28-6%29%29%2F2%29%2A22\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Make calculations.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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