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If S is the set of all real x such that ...

If `S` is the set of all real `x` such that `(2x - 1)/(2x^(3) + 3x^(2) + x)` is positive, then `S` contains

A

`(-3/2,1/4)`

B

`(-1/2,0)`

C

`(1/2,3)`

D

`(0,oo)`

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