For this case we have the following function:
f (x) = x + 4 if -4 <= x <3
f (x) = 2x-1 if 3 <= x <6
We observe that the function is defined from x = -4 (including it) to x = 6 (without including it).
Therefore, the domain of the function is:
[-4, 6]
Answer:
[-4, 6]
option 3
