If A = {b, c, d, e} and B = {b, c, e, g} and C = {a, c, e}, then verify A∪(B∪C)=(A∪B)∪C.

If A = {b, c, d, e} and B = {b, c, e, g} and C = {a, c, e}, then verify $A \cup (B \cup C) = (A \cup B) \cup C$ .

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