Choose the Graph Which Matches the Function $$f ( x ) = 3 ^ { - x } \cos 4 x$$

Multiple Choice

Choose the graph which matches the function.
- $$f ( x ) = 3 ^ { - x } \cos 4 x$$

A) Damping factor $= 4$ , damping occurs as $x \rightarrow \infty$
B) Damping factor $= 3 ^ { - x }$ , damping occurs as $x \rightarrow 0$
C) Damping factor $= 3 ^ { - x }$ , damping occurs as $\mathrm { x } \rightarrow \infty$ .
D) No damping