1.a) x-2≥0; x≥2; x ∈ [2;∞);
б) (2-x)^2>0;
|2-x|>0; 0<x<4; x ∈ (-∞;0)∪(4;∞);
2) 2x+4≥0; x≥-2;
x^2-4>0; x<-2; x>2;
x ∈ (2;∞);
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Answers & Comments
1.a) x-2≥0; x≥2; x ∈ [2;∞);
б) (2-x)^2>0;
|2-x|>0; 0<x<4; x ∈ (-∞;0)∪(4;∞);
2) 2x+4≥0; x≥-2;
x^2-4>0; x<-2; x>2;
x ∈ (2;∞);