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If (1)/(2 xx 4) + (1)/(4 xx 6) + (1)/(6 ...

If `(1)/(2 xx 4) + (1)/(4 xx 6) + (1)/(6 xx 8)` + …… n terms ` = (kn)/(n +1) ` then k is equal to

A

`(1)/(4)`

B

`(1)/(2)`

C

1

D

`(1)/(8)`

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