Direct expression for sum of squares

  • Thread starter cscott
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  • #1
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How do you go from [tex]\sum_{n = 1}^n i^2[/tex] to [tex]\frac{n(n + 1)(2n + 1)}{6}[/tex]?
 

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  • #2
arildno
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Prove the formula by induction.
 
  • #3
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I think you forgot to include something, what you wrote should simplify to [itex]n i^2[/itex].

Edit: Unless I'm missing something :confused:
 
  • #4
arildno
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Oops, the index should be i, not n as you've written.
 
  • #6
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Thanks for the info.

My mistake with the index.
 

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