Cho hai tập hợp \(A = \left[ {a;a + 2} \right),\,\,B = \left( {5;6} \right)\). Tìm tất cả các giá trị của a để:
a) A ⊂ B b) B ⊂ A c)A ∩ B = ∅.
A.\(\eqalign{ & a)\,\,a = 4 \cr & b)\,\,4 \le a \le 5 \cr & c)\,\,\left[ \matrix{ a \le 3 \hfill \cr a \ge 6 \hfill \cr} \right. \cr} \)
B.\(\eqalign{ & a)\,\,a \in \emptyset \cr & b)\,\,4 \le a \le 5 \cr & c)\,\,\left[ \matrix{ a \le 3 \hfill \cr a \ge 6 \hfill \cr} \right. \cr} \)
C.\(\eqalign{ & a)\,\,a = 4 \cr & b)\,\,4 \le a \le 5 \cr & c)\,\,\left[ \matrix{ a 6 \hfill \cr} \right. \cr} \)
D.\(\eqalign{ & a)\,\,a = 4 \cr & b)\,\,4 \le a \le 5 \cr & c)\,\,\left[ \matrix{ a 6 \hfill \cr} \right. \cr} \)
a) A ⊂ B b) B ⊂ A c)A ∩ B = ∅.
A.\(\eqalign{ & a)\,\,a = 4 \cr & b)\,\,4 \le a \le 5 \cr & c)\,\,\left[ \matrix{ a \le 3 \hfill \cr a \ge 6 \hfill \cr} \right. \cr} \)
B.\(\eqalign{ & a)\,\,a \in \emptyset \cr & b)\,\,4 \le a \le 5 \cr & c)\,\,\left[ \matrix{ a \le 3 \hfill \cr a \ge 6 \hfill \cr} \right. \cr} \)
C.\(\eqalign{ & a)\,\,a = 4 \cr & b)\,\,4 \le a \le 5 \cr & c)\,\,\left[ \matrix{ a 6 \hfill \cr} \right. \cr} \)
D.\(\eqalign{ & a)\,\,a = 4 \cr & b)\,\,4 \le a \le 5 \cr & c)\,\,\left[ \matrix{ a 6 \hfill \cr} \right. \cr} \)
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Hóa Học lớp 12
