1. The problem statement, all variables and given/known data delta dirac function(x) * e^(-i*x) at ∞ and -∞ 2. Relevant equations delta dirac(x)*e^(i*x) 3. The attempt at a solution I'm wondering how e^(i*x) looks like at infinity/-infinity. I know it has some sort of oscillating property i.e e^(pi*i)=e^(3pi*i). The problem is I'm trying to find the delta dirac function * e^(-i*x) at infinity and negative infinity but I don't know how to evaluate the exponential. I know the delta function should be 0 in both cases but I don't know if the exponential will turn out to be indeterminate or something else. I should get 0 from the whole equation.