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1 . 2+2 . 3+3 . 4+.. .. to n terms =...

 `1 . 2+2 . 3+3 . 4+.. ..` to n terms =

A

1)`(n(n+1)(n+5))/(3)`

B

2)`(n(n+1)(n+2))/(3)`

C

3)`(4(4 n^(2)+6 n-1))/(3)`

D

4) `n(n+1)(n+1)^(2)`

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The correct Answer is:
B
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HIMALAYA PUBLICATION-MATHEMATICAL INDUCTION AND SUMMATION OF SERIES-Question Bank
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