If \( S \) is the set of all real \( x \) such that \( \frac{2 x-1}... VIDEO
If \( S \) is the set of all real \( x \) such that \( \frac{2 x-1}{2 x^{3}+3 x^{2}+x} \) is
\( \mathrm{P} \)
positive, then \( S \) contains
W
(1) \( \left(-\infty,-\frac{3}{2}\right) \)
(2) \( \left(-\frac{3}{2},-\frac{1}{4}\right) \)
(3) \( \left(-\frac{1}{4}, \frac{1}{2}\right) \)
(4) \( \left(\frac{1}{2}, 3\right) \)
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