1)
- парабола, ветви вниз
x∈(-∞;1)∪(5;+∞)
2)
x∈(-∞;1]∪[5;+∞)
3)
x∈(1;5)
4)
x∈[1;5]
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Answers & Comments
1)
x∈(-∞;1)∪(5;+∞)
2)
x∈(-∞;1]∪[5;+∞)
3)
x∈(1;5)
4)
x∈[1;5]