Question

What is `lim_(->-oo) f(x) = e^-x`?

Answer 1

`e^oo = oo`

Explanation:

Plug in the limit

`lim_(x->-oo) f(x)=e^(-(-oo))`

Double negative becomes a positive

`lim_(x->-oo) f(x)=e^(oo)`

Then

`e^oo = oo`