- $\left[ {0;\,\frac{1}{{16}}} \right)$.
- $\left( { - \infty ;\,\frac{1}{{16}}} \right)$.
- $\left( { - \frac{1}{2};\,0} \right] \cup \left\{ {\frac{1}{{16}}} \right\}$
- $\left( { - \frac{1}{2};\,\frac{1}{{16}}} \right]$.