A = {∅,{∅},2,{2,∅},3}, which of the following is true?

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answerhappygod
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A = {∅,{∅},2,{2,∅},3}, which of the following is true?

Post by answerhappygod »

a) {{∅,{∅}} ∈ A
b) {2} ∈ A
c) ∅ ⊂ A
d) 3 ⊂ A
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