The range of the polynomial $P(x)=4 x^3-3 x$ as $x$ varies over the interval $\left(-\frac{1}{2}, \frac{1}{2}\right)$ is
The range of the polynomial $P(x)=4 x^3-3 x$ as $x$ varies over the interval $\left(-\frac{1}{2}, \frac{1}{2}\right)$ is
- [KVPY 2016]
- A
$[-1,1]$
- B
$(-1,1]$
- C
$(-1,1)$
- D
$\left(-\frac{1}{2}, \frac{1}{2}\right)$
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- [IIT 1992]
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