Question

19. For which of the following values of x is the function

f(x)=√4-x2 NOT defined as a real number?
[square root]
A. -2
B. 0
C. 2
D. 4

Answer 1

D. 4

Explanation:

thank you for your help 4 was the correct answer took the test and got it right

Answer 2

D. 4

Explanation:

`\sqrt{2-\left( 4\right)^(2) } =√(2-16) =√(-12)`

since ,√(-12) is not a real number

Then

The function f is not defined for x = 4