The Exponential Function A $\exp \left( e ^ { x } \right)$

Short Answer

The exponential function a. is the inverse of the natural logarithm function.
b. does not play an important role in modeling nonlinear regression functions in econometrics.
c. can be written as $\exp \left( e ^ { x } \right)$ .
d. is $e ^ { x }$ , where $e$ is $3.1415 \ldots$ .