A.\(\mathbb{R}\)
B.\(\left( { - \infty ;1} \right] \cup \left[ {2; + \infty } \right)\)
C.\(\left( { - \infty ;1} \right) \cup \left( {2; + \infty } \right)\)
D.\(\mathbb{R}\backslash \left\{ {1;2} \right\}\)
Loga
Hóa Học lớp 12
