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1) What's the sum of the squares of the first 16 natural

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1) What's the sum of the squares of the first 16 natural [#permalink] New post 22 Mar 2004, 15:23
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1) What's the sum of the squares of the first 16 natural numbers?

2) What's the sum of the cubes of the first 16 natural numbers?
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 [#permalink] New post 22 Mar 2004, 16:12
n(n+1)(2n+1)/6 = sum of first n squares
[n(n+1)/2]^2 = sum of first n cubes

substitute 16 in the above expressions, have your answer=)
  [#permalink] 22 Mar 2004, 16:12
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1) What's the sum of the squares of the first 16 natural

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