Question

find the ideal of 4Z ​

Answer 1

Step-by-step explanation:

M = 4Z is a maximum ideal of E =2Z as no other ideals lying between 4Z and 2Z . However , E/M = ( M , 2+M ) where ( 2+M ) 2= 4 + M =M = (2+M) M . So E/M is not a field