Ответ:
1. a(a+b) > ab - 2
2a + ab > ab - 2
2. 2ab - 1 < b(2a + b)
2ab - 1 < 2ab + 2b
3. 3ab - 2 < a(3b + a)
3 ab - 2 < 3ab + 2a
4. b(a + 2b) > ab - 3
ab + 3 b > ab - 3
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Ответ:
1. a(a+b) > ab - 2
2a + ab > ab - 2
2. 2ab - 1 < b(2a + b)
2ab - 1 < 2ab + 2b
3. 3ab - 2 < a(3b + a)
3 ab - 2 < 3ab + 2a
4. b(a + 2b) > ab - 3
ab + 3 b > ab - 3