\[\eqalign{ & 0\,\, \in \,\,N;\,\,\,\,\,\,\,\, - 35\,\, \in \,Z;\,\,\,\,\,\,\,\, - 31\,\, \in Q \cr & {4 \over 2}\,\, \in Z;\,\,\,\,\,\,\, - {5 \over 7}\,\, \in \,Q;\,\,\,\,\,\,\,\,\,\,\,\,N\,\, \subset \,Z\,\, \subset \,\,Q \cr} \]
Đề bài
Điền kí hiệu \[\left[ { \in ,\,\, \notin ,\,\, \subset } \right]\] thích hợp vào ô vuông:
\[\eqalign{ & 0\,\,...\,\,N;\,\,\,\,\,\,\,\, - 35\,\,...\,\,Z;\,\,\,\,\,\,\,\, - 31\,\,...\,\,Q \cr & {4 \over 2}\,\,....\,Z;\,\,\,\,\,\,\, - {5 \over 7}\,\,....\,Q;\,\,\,\,\,\,\,\,\,\,\,\,N\,\,...\,\,Z\,\,...\,\,\,Q \cr} \]
Phương pháp giải - Xem chi tiết
\[\eqalign{ & 0\,\, \in \,\,N;\,\,\,\,\,\,\,\, - 35\,\, \in \,Z;\,\,\,\,\,\,\,\, - 31\,\, \in Q \cr & {4 \over 2}\,\, \in Z;\,\,\,\,\,\,\, - {5 \over 7}\,\, \in \,Q;\,\,\,\,\,\,\,\,\,\,\,\,N\,\, \subset \,Z\,\, \subset \,\,Q \cr} \]
Lời giải chi tiết