Question

1^ 2 +2^ 2 +3^ 2 +---+n^ 2 = n(n+1)(n+2) \6
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Answer 1

Answer:

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Answer 2

that's wrong

like we if take n = 3

1² + 2² + 3³ = 1 + 4 + 9 = 14

BUT,

n(n+1)(n+2)\6 = 3 x 4 x 5 \ 6 = 60\6 = 10