# Using L'hopital's rule in exponential function

1. Feb 29, 2012

### Elsasw

Is that any way to find a finite value which is not equal to zero using L'hopital's rule in

limit(z=-ia)
exp[-A/(z+ia)]/(z+ia)^2

i kept getting 0/0 after differentiation

Thank you

2. Feb 29, 2012

### HallsofIvy

Staff Emeritus
$$\lim_{z\to -ia}\frac{e^{-A/(z+ ia)}}{(z+ia)^2}$$