Question

What is the domain and range of `y=2^x`?

Answer 1

I found:
domain: `-oo<` `x` `<+oo`
range: `0<` `y` `<+oo`

Explanation:

Your function can accept any real value of `x` and devolves only positive values of `y`.
The domain will be any real `x`;
The range will be all the `y` values between zero and `+oo`.
Graphically:
graph{2^x [-10, 10, -5, 5]}