Evaluate \[\underset{x\to \infty }{\mathop{\lim }}\,{{2}^{x-1}}\tan \left( \frac{a}{{{2}^{x}}} \right).\]

Evaluate \[\underset{x\to \infty }{\mathop{\lim }}\,{{2}^{x-1}}\tan \l

1.	Evaluate \[\underset{x\to \infty }{\mathop{\lim }}\,{{2}^{x-1}}\tan \left( \frac{a}{{{2}^{x}}} \right).\]
A.	\[a\]
B.	\[2a\]
C.	\[\frac{a}{2}\]
D.	\[4a\]
Answer» D. \[4a\]

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Evaluate \[\underset{x\to \infty }{\mathop{\lim }}\,{{2}^{x-1}}\tan \left( \frac{a}{{{2}^{x}}} \right).\]

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