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1+2+3+…….+(n+1)= ((n+1) (n+2))/(2) , n i...

`1+2+3+…….+(n+1)= ((n+1) (n+2))/(2) , n in N`.

A

For P(1) , L.H.S = 7 = R.H.S.

B

For P(1) , L.H.S = 3 = R.H.S.

C

`P(k) rArr P(k+1) , k in N` is not true

D

By the principle of mathematical induction P(n) is true for all `n in N` . Which is not true .

Text Solution

Verified by Experts

The correct Answer is:
B
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