Điền kí hiệu \( \in \) hoặc \( \notin \) vào ô vuông cho đúng :
\(\eqalign{
& a)\;4…ƯC\left( {12,18} \right) \cr
& b)\;6…ƯC\left( {12,18} \right) \cr
& c)\;2…ƯC\left( {4,6,8} \right) \cr
& d)\;4…ƯC\left( {4,6,8} \right) \cr
& e)\;80…BC\left( {20,30} \right) \cr
& g)\;60…BC\left( {20,30} \right) \cr
& h)\;12…BC\left( {4,6,8} \right) \cr
& i)\;24…BC\left( {4,6,8} \right). \cr} \)
Advertisements (Quảng cáo)
\(\eqalign{ & a)\;4 \notin ƯC\left( {12,18} \right) \cr & b)\;6 \in ƯC\left( {12,18} \right) \cr & c)\;2 \in ƯC\left( {4,6,8} \right) \cr & d)\;4 \notin ƯC\left( {4,6,8} \right) \cr & e)\;80 \notin BC\left( {20,30} \right) \cr & g)\;60 \in BC\left( {20,30} \right) \cr & h)\;12 \notin BC\left( {4,6,8} \right) \cr & i)\;24 \in BC\left( {4,6,8} \right). \cr} \)