Question

A = {5} B = {2} Find A union B

Answer 1

The union is everything that is in either A or B, so in this case it is {5,2}

Answer 2

oh ok thanks for explaining

Answer 3

whatwould the intersection be? @nbouscal

Answer 4

The intersection is everything that is in both A and B. So in this case there is nothing in both, so it's the empty set.

Answer 5

ok thanks again