Question

集合A={n/2/n∈z},B=｛m/ (m+1)/2∈Z ｝,则A∩B=

Answer 1

是A={n|n/2∈z},B=｛m| (m+1)/2∈Z ｝吧
由A={n|n/2∈z}得n=.-2,0,2.
由B=｛m| (m+1)/2∈Z ｝得m=.-1,1,3,.
所以A∩B={x|x∈z}