How do you find the domain of #f(x) = 3x + 1#?
This is a polynomial, since it is written as a sum of powers of
In this case,
The domain of every polynomial is always the whole real number set, since the domain is the set of numbers where you can evaluate the function, and a polynomial simply "asks" to raise numbers to a certain power, multiply by some constant, and sum all the terms.
These operations can be performed with every number