document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=853590>Question 853590</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the sum of the infinite geometric series? <BR>\n" );
document.write( "(-15)+ 0+ 15 +30+.....+195\r<BR>\n" );
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document.write( "Please show me step by step, thank you in advance! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #514153 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=514153\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is not a geometric series.<BR>\n" );
document.write( "An = a1 + (n - 1)d<BR>\n" );
document.write( "195 = -15 + (14)15<BR>\n" );
document.write( "and it has 15 terms <BR>\n" );
document.write( "the difference is 15<BR>\n" );
document.write( "195 is the 15th term starting with -15<BR>\n" );
document.write( "It is a finite arithmetic series<BR>\n" );
document.write( "S = ½(a1 + an)n<BR>\n" );
document.write( "S = ½(-15 + 195)15<BR>\n" );
document.write( "S = 90*15=1350 </SPAN>\n" );
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