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Prove by the principle of mathematical induction that: `n(n+1)(2n+1)` is divisible by `6` for all `n in Ndot`

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Given ,
`p(n)=n(n+1)(n+2) `is divisible by 6.
For `n=1.`.
`p(1)=1xx(1+1)xx(1+2)=6; `divisible by 6.
For `n=2`
...
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