2. b:
3. a
b > 0
a > 0 & b > 0 
a < 0 & b < 02. b:
3. a > 0 & b > 0
a < 0 & b < 0 ab > 0 
a,b:. ab > 0 
a > 0 & b > 0 a < 0 & b < 0| 1 | 1. a: 2. b: 3. a b > 0 a > 0 & b > 0 a < 0 & b < 0 |
| 2 | 1. a: 2. b: 3. a > 0 & b > 0 a < 0 & b < 0 ab > 0 |
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