#### Answer

$$
f(x)=e^{x},
$$
To find the second derivative of find the first derivative, and then
take its derivative.
$$
f^{\prime}(x)=e^{x},
$$
$$
f^{\prime\prime}(x)=e^{x},
$$
$$
f^{\prime\prime\prime}(x)=e^{x},
$$
and so on
$$
f^{(n)}(x)=e^{x},
$$