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Prove the following by using the princip...

Prove the following by using the principle of mathematical induction for all `n in N` :- `1/(1.2.3)+1/(2.3.4)+1/(3.4.5)+...+1/(n(n+1)(n+2))=(n(n+3))/(4(n+1)(n+2))`.

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PSEB-PRINCIPLE OF MATHEMATICAL INDUCTION-EXERCISE
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