Question

A = φ, B = φ then A U B =​

Answer 1

Answer:

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Step-by-step explanation:

union of the sets A and B

Definition 1. The union of the sets A and B, denoted by A U B, is the set that contains those elements that are either in A or in B, or in both. ... The intersection of the sets A and B, denoted by A n B, is the set containing those elements in both A and B. A n B = 1x | x ∈ A < x ∈ Bl.

Answer 2

Step-by-step explanation:

the union of A and B is the same phai