Question

How do you find the domain of `f(x)= x +4`?

Answer 1

See explanation.

Explanation:

The domain of a function is the largest subset of `RR` for which the function's value is defined.

For the function `f(x)=x+4` there are no limitations, so the domain is `RR`.

The function could have a limited domain if it had:

• variable in the denominator of a fraction (such expression cannot be 0)

• variable in an expression under square root sign (such expression cannot be negative)