Question

1. Given A = {1,2,3,4}, B ={1,2,4,5), C={3,4,6}, D= {7,8}. U={1,2,3,4,5,6,7,8,9}

What is A UB? Bn C? CD? A'? (A U B)

Answer 1

Explanation:

A∪B = {1,2,3,4,5}

B∩C = {4}

I don't know what CD means.

A' = {5,6,7,8,9}