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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 `(-oo,-3/2)` b. `(-3/2,1/4)` c. `(-1/4,1/2)` d. `(1/2,3)` e. None of these

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