HELP on MATH!! with Union and Intersections?

Question

If A={-10, -5, 0, 5, 10} and B={0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

1. Find A U B

2. Find A the opposite of U B

Answer 1

I'm wrong, the first dude was right... sorry about that.

Answer 2

A U B = {every number} because it means whats in both A and B

A ∩ B = { 0, 5, 10} meaning whats common to both

Answer 3

Union is what the two sets have in common:

A={-10, -5, 0, 5, 10}

B={0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

U= [0, 5, 10]  <The over lap of A and B of a venn diagram

This leaves in the 'A' side of the venn diagram: [-10, -5]

This leaves in the 'B' side of the venn diagram [1, 2, 3, 4, 6, 7, 8, 9]