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Câu hỏi: Cho tập \(A = \left\{ { - 1; 0; 1; 2} \right\}\). Khi đó ta cũng có:
A. \(A = \left[ { - 1; 3} \right) \cap N\)
B. \(A = \left[ { - 1; 3} \right) \cap Z\)
C. \(A = \left[ { - 1; 3} \right) \cap N^*\)
D. \(A = \left[ { - 1; 3} \right) \cap Q\)
A. \(A = \left[ { - 1; 3} \right) \cap N\)
B. \(A = \left[ { - 1; 3} \right) \cap Z\)
C. \(A = \left[ { - 1; 3} \right) \cap N^*\)
D. \(A = \left[ { - 1; 3} \right) \cap Q\)
\(\begin{array}{l}
\left[ { - 1; 3} \right) \cap N = \left\{ {0; 1; 2} \right\} \ne A\\
\left[ { - 1; 3} \right) \cap Z = \left\{ { - 1; 0; 1; 2} \right\} = A\\
\left[ { - 1; 3} \right) \cap {N^*} = \left\{ {1; 2} \right\} \ne A\\
\left[ { - 1; 3} \right) \cap Q \ne A
\end{array}\)
\left[ { - 1; 3} \right) \cap N = \left\{ {0; 1; 2} \right\} \ne A\\
\left[ { - 1; 3} \right) \cap Z = \left\{ { - 1; 0; 1; 2} \right\} = A\\
\left[ { - 1; 3} \right) \cap {N^*} = \left\{ {1; 2} \right\} \ne A\\
\left[ { - 1; 3} \right) \cap Q \ne A
\end{array}\)
Đáp án B.