Find the limit and any horizontal asymptotes:
Principle 1: A limit defines a horizontal asymptote whenever x→∞ or x→-∞.
Principle 2: If a limit goes to ∞ or -∞, there won't be a horizontal asymptote.
The Attempt at a Solution
lim 4/(e-x) = ∞
since as x gets bigger, ex also gets bigger.
Horizontal Asymptote = 0
Given the above answer, if correct, then I have a problem with the two above principles I learned. Should I email my professor about these two principles? I am trying to learn these first before I do the actual homework.