Cho tập hợp A ={1;2;3}. Tập hợp nào là tập rỗng ?

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Đáp án:

Giải thích các bước giải:

Tập hợp rỗng có thể là A(4)

Đáp án:

Giải thích các bước giải: tập hợp rỗng là tập hợp ko có phần tử nào cả

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