1. х∈(-∞;-1,7)
2. х∈[7*2/3;+∞)
3. Х∈(-∞;8*1/3]
4. Х∈(-∞;-6)
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Answers & Comments
1. х∈(-∞;-1,7)
2. х∈[7*2/3;+∞)
3. Х∈(-∞;8*1/3]
4. Х∈(-∞;-6)