Question

What is F union H and F intersect H?​

Answer 1

-infinity, infinity I don’t know the second one I hope this helps tho

Answer 2

F ∪ H = (-∞, ∞)

F ∩ H = [4,7)

Explanation:

First it's a good idea to write both F and H in interval notation. F is [4, ∞) because the lowest point is 4, and it can equal 4, so the bracket, and then the upper limit is infinity, which always has a parenthesis.

H is (-∞, 7) because it's lowest limit is negative infinity and upper limit is 7, but it cannot equal 7 so it has a parenthesis as well.

Now we find the union and intersection. Union is everything in both. H starts at negative infinty and goes up to 7, but F starts at 4 and goes to infinity, so F includes the end of H so it's all a continuous from negative infinity to infinity, both having parenthesis.

The intersection is just what the two sets share. F has the same elements as H does from 4 to 7, not including 7, let me know if you need help catching this, or any part really.