Union and Intersection of Sets

Question

I need help figuring out how to find the Union or intersection of sets when provided with inequalities.

For example:
Find the intersection of sets {xlx<9},{xlx<-8}
Find the Union of sets {xlx<9}, {xlx<-8}

Thank you!

In: 0

Answer 1

When given sets like these what I would do is to mark them on the numberline this perfectly visualises the problem. The part you marked twice is the intersection and the parts you marked altogether is the union.