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The sum of the series 1/1.3+2/1.3.5+3/1...

The sum of the series `1/1.3+2/1.3.5+3/1.3.5.7`+…is equal to :

A

Twice maximum value of `f(x)=x-x^2`

B

1/p where p is even prime

C

L.C.M. of 1/4 and 1/2

D

Half of period of f(x) =x -[x], where [x] is G.I.F

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The correct Answer is:
A, B, C, D
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