Question

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Answer 1

A={x apartine Z stelat l x^2 ≤ 2^2}

x^2 ≥ 0

dar in problema, x apartine Z stelat ==> x≠0 ==> x > 0 ==> x^2 > 0

0 < x^2 ≤ 2^2

0 < x^2 ≤ 4

0 < x ≤ 2

x apartine multimii = {1;2}