Prove the commutative property — task. Mathematics State Board, Class 9.

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If \(A = \{\)4, 9, 20, 30, 34\(\}\) and \(B = \{\)9, 16, 26, 34\(\}\), then prove that commutative property for union of sets.

1. Commutative property for union of sets \(=\)

2. \(B \cup A = \{\)\(\}\)

[Note: Insert your answer in ascending order, also insert a comma if necessary]

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15. Prove the commutative property