Prove by PMI that `1.2+ 2.3+3.4+....+ n(n+1) =((n)(n+1)(n+2))/3, AA n in N`
Channel: Doubtnut
Date: 2019-12-27

Prove by PMI that `1.2+ 2.3+3.4+....+ n(n+1) =((n)(n+1)(n+2))/3, AA n in N`

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