1.

State in each case whether A ⊂ B or A ⊄ B. A = {x : xϵZ, x2 = 1}, B = {x : x ϵ N, x2 = 1}

Answer»

A ⊄ B 

Explanation: we have, A = { -1,1} and B={1} 

Since, -1∈A and -1∉B thus A ⊄ B .



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