Nếu $ x\in A\backslash B $ thì ta có
A. $ \left[ \begin{array}{l} & x\in A \\ & x\in B \\ \end{array} \right. $
B. $ \left[ \begin{array}{l} & x
otin A \\ & x\in B \\ \end{array} \right. $
C. $ \left\{ \begin{array}{l} & x\in A \\ & x
otin B \\ \end{array} \right. $
D. $ \left\{ \begin{array}{l} & x\in A \\ & x\in B \\ \end{array} \right. $
A. $ \left[ \begin{array}{l} & x\in A \\ & x\in B \\ \end{array} \right. $
B. $ \left[ \begin{array}{l} & x
otin A \\ & x\in B \\ \end{array} \right. $
C. $ \left\{ \begin{array}{l} & x\in A \\ & x
otin B \\ \end{array} \right. $
D. $ \left\{ \begin{array}{l} & x\in A \\ & x\in B \\ \end{array} \right. $
Loga
Hóa Học lớp 12
