1 + (1 +2) + (1 + 2 + 3) + …. To n term ...

1 + (1 +2) + (1 + 2 + 3) + …. To n term is

A

a) n (n + 1) (n + 2)

B

b) n/2 (n +1) (n + 2)

C

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

D

d) n/6 (n+ 1) (n + 2)

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