 |
| |||
| multiplying the first relation by 2 followed by summation, we come to the concise form of the above equation | |||
| последующее суммирование: 4 фразы в 2 тематиках |
| Математика | 2 |
| Нефть | 2 |
|
| |||
| multiplying the first relation by 2 followed by summation, we come to the concise form of the above equation | |||
| последующее суммирование: 4 фразы в 2 тематиках |
| Математика | 2 |
| Нефть | 2 |