708 5 | ( | 1 | + | r | − | 2 | r | × | 997 1000 | ) | = | 1 | + | r |
方程左边 = | 708 5 | × | 1 | + | 708 5 | r | − | 708 5 | × | 2 | r | × | 997 1000 |
= | 708 5 | + | 708 5 | r | − | 176469 625 | r |
= | 708 5 | − | 87969 625 | r |
708 5 | − | 87969 625 | r | = | 1 | + | r |
- | 87969 625 | r | − | r | = | 1 | − | 708 5 |
- | 88594 625 | r | = | 1 | − | 708 5 |
- | 88594 625 | r | = | - | 703 5 |
703 5 | = | 88594 625 | r |
88594 625 | r | = | 703 5 |
r | = | 703 5 | ÷ | 88594 625 |
= | 703 5 | × | 625 88594 |
= | 703 | × | 125 88594 |
r | = | 87875 88594 |
r | = | 0.991884 |