How to find domain for f(x)=x+4?

2 Answers
Sep 25, 2015

Domain x4

Explanation:

The domain is the set of x values that your function can accept. In this case you have a square root that cannot accept a negative argument.
So you may say that must be:
x+40
or
x4 meaning that as long as x is equal or bigger than 4 it is ok!

Refer to explanation

Explanation:

When you have a function with formula

f(x)=g(x) where g(x) is a polynomial then for the function f
to be defined we need the condition that g(x)0.

Hence in our case g(x)=x+4 hence x+40 or x4

So the domain is D(f)=[4,+)