1.

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

Answer»

`(N(n+1)(n+2))/(6)`
`(n(n+1)(2n+1))/(6)`
`(n(n+1)(2n+7))/(6)`
`(n(n+1)(2n+9))/(6)`

ANSWER :C


Discussion

No Comment Found

Related InterviewSolutions