Equivalent Domain and Range

Hi,

Can you please explain the below the highlighted? When x = 0 , isn’t f(x) undefined?

Kind regards,

Yes, and what’s the domain and range of that function as a result?

Isn’t the domain 0 and the range undefined? ie so they are not equal?

Why is the range undefined?

For example for x=2\frac{1}{2} outputs a real number.

The domain is anything except 0
The range is everything except 0