Question

What is the Domain of the function y=square root x+4

A)-infinity < x < infinity
B)-4 greater than or equal too x < infinity
C) 0 greater than or equal too x< infinity
D) 4 greater than or equal too x< infinity

Answer 1

Since there is no real square root of a negative value:

x+4≥0

x≥-4, in interval notation:

x=[-4, +oo)

In words, x is greater than or equal to negative 4.