False i forgot the actuall formula but thats not it
Answer:
D_{f(x)} = [9, \infty)
Step-by-step explanation:
Here we have the square root of a function, in the following format:

For the square root, and roots of even numbers(root of 4, 6, ...), we have the following condition in the domain

In this problem, we have that:

So


So the domain is

Answer:
Step-by-step explanation: