Range of a rational function

1. A.
   $(-\infty,\infty)$
2. B.
   $[-1,1]$
3. C.
   $\left[-\frac{1}{2},\frac{1}{2}\right]$
4. D.
   $[-2,2]$

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1. A.
   $\left[1, \frac{7}{3}\right)$
2. B.
   $\left(1, \frac{7}{3}\right)$
3. C.
   $\left(1, \frac{7}{3}\right]$
4. D.
   $\left[1, \frac{7}{3}\right]$

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1. A.
   (0,1)
2. B.
   [0,1)
3. C.
   (0,1]
4. D.
   [0,1]

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1. A.
   $2$
2. B.
   $4$
3. C.
   $\dfrac{4}{\sqrt{3}}$
4. D.
   $2\sqrt{3}$

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