Question

$f(x) = 2x + 5 + 1 \:x - 1\\x - 7 \: \: \:$
билим ленд ​

Answer 1

Ответ:

1) D(f) = (–∞; –1) ∪ (–1; 1) ∪ (1; +∞)

2)x ≠ 1, x ≠ –1