document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=860385>Question 860385</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sum of the first n squares, given by the sum of the terms 1+4+9+...n^2 can be calculated by using the formula n/6(n+1)(2n+1).<BR>\n" );
document.write( "What is the value of the 20th term of the series?<BR>\n" );
document.write( "Find the sum of the first 25 squares.<BR>\n" );
document.write( "Do I just have to put 20 and 25 instead of n? Cos I'm not quite sure what I have to do. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #518385 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=518385\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> to find the 20th term <BR>\n" );
document.write( "a20=20^2=400<BR>\n" );
document.write( "The sum of the first 25 terms is the formula given<BR>\n" );
document.write( "n/6(n+1)(2n+1) where n =25<BR>\n" );
document.write( "25/6(25+1)(2*25+1)<BR>\n" );
document.write( "25/6*26*51<BR>\n" );
document.write( "25/(2*3)*2*13*3*17\r<BR>\n" );
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document.write( "25*13*17=5525\r<BR>\n" );
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document.write( " </SPAN>\n" );
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