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The value of 2 + 4 + 6 + ….+ 2n is...

The value of 2 + 4 + 6 + ….+ 2n is

A

`(n(n-1))/2`

B

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

C

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

D

`n(n+1)`

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