^{20}Recall from calculus that the derivative of the function e^{x} with respect to x is simply e^{x}. That is, the value of an
exponential function’s slope is equal to the value of the original exponential function! If the exponent contains any constants
multiplied by the independent variable, those constants become multiplying coefficients after differentiation. Thus,
the derivative of e^{kx} with respect to x is simply ke^{kx}. Likewise, the derivative of e^{jωt} with respect to t is
jωe^{jωt}.