Question

If A = {4, 5, 6}; B = {7, 8} then show that A ∪ B = B ∪ A.

Answer 1

A U B={4,5,6,7,8}....…(1)

BUA={4,5,6,7,8}.........(2)

(1) & (2) eq are from definition of union

They are Called equal sets and equivalent sets so they are equal
Thank you

Answer 2

hello

here's your answer

given

A = { 4, 5,6 } B = { 7, 8 }

Therefore A union B or B union A means a set of elements which is in set A and B both.

A U B = { 4,5,6,7,8 }

B U A = { 4,5,6,7,8 }

A U B = B U A .

hence LHS = RHS .