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Given,
A = { 6,9,11 }
A U ∅ = {6,9,11 } U { }
= { 6,9,11 }
= A.
Therefore A U ∅ = A.
:)
A = { 6,9,11 }
A U ∅ = {6,9,11 } U { }
= { 6,9,11 }
= A.
Therefore A U ∅ = A.
:)
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Refer to attachment........^_^
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