на ноль делить нельзя
x-2≠0;
x≠2;
x+1≠0;
x≠-1;
x ∈ (-∞;-1) ∪ (-1;2) ∪ (2;∞);
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на ноль делить нельзя
x-2≠0;
x≠2;
x+1≠0;
x≠-1;
x ∈ (-∞;-1) ∪ (-1;2) ∪ (2;∞);