Find the domain of the function. f(x)=\sqrt{12 x^{2}+2} \left(-\infty,-\frac{1}{6}\right] \left(-\frac{1}{6}, \infty\right) \left[-\frac{1}{6}, \infty\right) \left(-\infty,-\frac{1}{6}\right) (-\infty, \infty)

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