Trong các suy luận sau, suy luận nào đúng.
A.\(\left\{ \matrix{ a < 1 \hfill \cr b < 1 \hfill \cr} \right. \Rightarrow ab < 1\)
B.\(\left\{ \matrix{ a < 1 \hfill \cr b < 1 \hfill \cr} \right. \Rightarrow a - b < 1\)
C.\(\left\{ \matrix{ a < 1 \hfill \cr b < 1 \hfill \cr} \right. \Rightarrow {a \over b} < 1\)
D.\(\left\{ \matrix{ 0 < a < 1 \hfill \cr b < 1 \hfill \cr} \right. \Rightarrow ab < 1\)
A.\(\left\{ \matrix{ a < 1 \hfill \cr b < 1 \hfill \cr} \right. \Rightarrow ab < 1\)
B.\(\left\{ \matrix{ a < 1 \hfill \cr b < 1 \hfill \cr} \right. \Rightarrow a - b < 1\)
C.\(\left\{ \matrix{ a < 1 \hfill \cr b < 1 \hfill \cr} \right. \Rightarrow {a \over b} < 1\)
D.\(\left\{ \matrix{ 0 < a < 1 \hfill \cr b < 1 \hfill \cr} \right. \Rightarrow ab < 1\)
Loga
Hóa Học lớp 12
