Đề bài

Điền kí hiệu \(\left( { \in ,\,\, \notin ,\,\, \subset } \right)\) thích hợp vào ô vuông:

\(\eqalign{  & 0\,\,...\,\,N;\,\,\,\,\,\,\,\, - 35\,\,...\,\,Z;\,\,\,\,\,\,\,\, - 31\,\,...\,\,Q  \cr  & {4 \over 2}\,\,....\,Z;\,\,\,\,\,\,\, - {5 \over 7}\,\,....\,Q;\,\,\,\,\,\,\,\,\,\,\,\,N\,\,...\,\,Z\,\,...\,\,\,Q \cr} \)

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\(\eqalign{  & 0\,\, \in \,\,N;\,\,\,\,\,\,\,\, - 35\,\, \in \,Z;\,\,\,\,\,\,\,\, - 31\,\, \in Q  \cr  & {4 \over 2}\,\, \in Z;\,\,\,\,\,\,\, - {5 \over 7}\,\, \in \,Q;\,\,\,\,\,\,\,\,\,\,\,\,N\,\, \subset \,Z\,\, \subset \,\,Q \cr} \)

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