How to find domain for #f(x) = x^2+3#?
The domain is the whole set
The domain of a function is the set of value you can give as input to the function. Now, your function takes a number
The question is: is there any number which can't be squared? And the answer is no: we can square any real number, since it is always a legit operation. Needless to say, we can also always add