document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=967771>Question 967771</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The sum of first 20 terms of the series 1,4,9,16....... </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #591501 by </B><A HREF=/tutors/aboutme.mpl?userid=satyareddy22><B>satyareddy22(84)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=satyareddy22><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=591501\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> sum of squares of first n natural numbers = n(n+1)(2n+1)/6<BR>\n" );
document.write( "n=20<BR>\n" );
document.write( "= 20(20+1)(40+1)/6<BR>\n" );
document.write( "=20(21)(41)/6<BR>\n" );
document.write( "=2870 </SPAN>\n" );
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