[e^x]*[e^(-x)]= ?

Question

In other words (exp(x))*(exp(-x)) =


(You can get double points on this by answering a similar question that is presently unanswered.)

Answer 1

Adding the exponents is the preferred approach, note also that
since, e^(-x) = 1/e^x, the problem becomes
e^x / e^x = 1.

Answer 2

Add the exponents and get


e^0 = 1