Ответ:
1) x ∈ (-∞;12) ∪ (12;+∞);
2) x ∈ (-∞; -1) ∪ (-1;+∞).
Объяснение:
1) 1/(x-12): тут (x-12)≠0; → x≠12; → x ∈ (-∞;12) ∪ (12;+∞);
2) 9/(x+1): тут (x+1)≠0; → x≠-1; → x ∈ (-∞; -1) ∪ (-1; +∞).
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Ответ:
1) x ∈ (-∞;12) ∪ (12;+∞);
2) x ∈ (-∞; -1) ∪ (-1;+∞).
Объяснение:
1) 1/(x-12): тут (x-12)≠0; → x≠12; → x ∈ (-∞;12) ∪ (12;+∞);
2) 9/(x+1): тут (x+1)≠0; → x≠-1; → x ∈ (-∞; -1) ∪ (-1; +∞).