Answer:
The requited interval is:
Step-by-step explanation:
We have to write two intervals in our case:
The first interval must highlight all real numbers less than or equal to 0.
Therefore,
This interval starts at -∞ and ends at 0, which is written as: (-∞, 0]
The second interval must highlight all real numbers greater than or equal to 0.
Therefore,
This interval starts at 0 and ends at ∞, which is written as: [0, ∞)
But, we have to combine these two sets. We can achieve this by placing the union symbol 'U' between the two intervals.
Therefore, the requited interval is:
