Answer:
- f(x), g(x)
- 10, 0, UNDEFINED
Explanation:
You want to know which functions have 5 in their domain, and what the function value is at x=5.
- f(x) = x² -3x
- g(x) = (x -5)/x
- h(x) = √(x -10)
Values
It is more convenient to do the second part first, as that tells you the answer to the first part:
f(5) = 5² -3·5 = 25 -15 = 10 . . . . 5 is in the domain
g(5) = (5 -5)/5 = 0/5 = 0 . . . . 5 is in the domain
h(5) = √(5 -10) = √(-5) . . . . UNDEFINED; 5 is not in the domain