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For any integer n ge 1, then sum(k=1)^(n...

For any integer `n ge 1`, then `sum_(k=1)^(n) k ( k+2)` is equal to

A

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

B

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

C

`( n ( n+1) (2n+7) )/(6)`

D

`(n (n+1) (2n+9) )/( 6)`

Text Solution

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The correct Answer is:
C
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