Question

Answer 1

\(6,\\ A=\left\{0;1;2;3;4\right\}\\ A=\left\{x\in N|x< 5\right\}\)

Answer 2

\(5,\\ \left\{1;2\right\};\left\{1;3\right\};\left\{1;x\right\};\left\{2;3\right\};\left\{2;x\right\};\left\{3;x\right\}\)

Answer 3

Bạn cần những bài nào thì bạn nên chỉ rõ ra.

Answer 4

\(7,\\ 1.A=\left\{0;1;2;3\right\}\\ 2.Câu.đúng:0\in A;3\in A;2\in A;5\notin A\\ 3.3\in A;5\notin A;4\notin A\\ 0\in A;1\in A;2\in A\)