Q1 of 145 Page 15

State in each case whether A ⊂ B or A ⊄ B.

A = {x : xϵZ, x2 = 1}, B = {x : x ϵ N, x2 = 1}


A ⊄ B

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


Since, -1∈A and -1∉B thus A ⊄ B .


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