document.write( "Question 795476: sum 2+5+10+17+....... to n terms \n" ); document.write( "
Algebra.Com's Answer #481015 by AnlytcPhil(1806)\"\" \"About 
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document.write( "2+5+10+17+...\r\n" );
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document.write( "1²+2²+3²+4²+...+n² = n(n+1)(2n+1)/6 = 1+4+9+16+...\r\n" );
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document.write( "Each term of your series is 1 more than the correspondimng\r\n" );
document.write( "term in that series.\r\n" );
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document.write( "Since there are n terms, it's just the formula\r\n" );
document.write( "for the sum of squares + n\r\n" );
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document.write( "Answer: 2+5+10+17+...(n²+1) = n(n+1)(2n+1)=/6 + n\r\n" );
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document.write( "You can do some algebra on that if you like, but that's the\r\n" );
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document.write( "Edwin

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