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| 4. , | + + ≤ |
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| 1 | 1. 2. | |
| 2 | 1. 2. | |
| 3 | 1. 2. | |
| 4 | ||
| 1 | 1. , 2. 3. | |
| 2 | 1. 2. | |
| 3 | ||
| 4 | 1. 2. 3. | |
| 1 ≥ 1 2 ≥ 2 3 ≥ 3 4 ≤ 4 | ||
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