Question

Find a the intersection , and b the union of the intervals
[-1, 3] and (0; 4)

Answer 1

Intersection is the common part of the two intervals:

• A ∩ B =
• [- 1, 3] ∩ (0, 4) =
• (0, 3]

Union is the add up of the two intervals:

• A ∪ B =
• [- 1, 3] ∪ (0, 4) =
• [- 1, 4)