( | 1 | ÷ | d | ) | + | ( | 1 | ÷ | d | + | 1 | ) | + | ( | 1 | ÷ | d | + | 2 | ) | + | ( | 1 | ÷ | d | + | 5 | ) | = | 0 |
1 | ÷ | d | + | ( | 1 | ÷ | d | + | 1 | ) | + | ( | 1 | ÷ | d | + | 2 | ) | + | ( | 1 | ÷ | d | + | 5 | ) | = | 0 |
方程两边同时乘以: | d |
1 | + | ( | 1 | ÷ | d | + | 1 | ) | d | + | ( | 1 | ÷ | d | + | 2 | ) | d | + | ( | 1 | ÷ | d | + | 5 | ) | d | = | 0 |
1 | + | 1 | ÷ | d | × | d | + | 1 | d | + | ( | 1 | ÷ | d | + | 2 | ) | d | + | ( | 1 | ÷ | d | + | 5 | ) | d | = | 0 |
1 | + | 1 | ÷ | 1 | × | 1 | + | 1 | d | + | 1 | ÷ | d | × | d | + | 2 | d | + | ( | 1 | ÷ | d | + | 5 | ) | = | 0 |
1 | + | 1 | + | 1 | d | + | 1 | ÷ | d | × | d | + | 2 | d | + | ( | 1 | ÷ | d | + | 5 | ) | d | = | 0 |
2 | + | 3 | d | + | 1 | ÷ | d | × | d | + | ( | 1 | ÷ | d | + | 5 | ) | d | = | 0 |
2 | + | 3 | d | + | 1 | ÷ | 1 | × | 1 | + | 1 | ÷ | d | × | d | + | 5 | d | = | 0 |
2 | + | 3 | d | + | 1 | + | 1 | ÷ | d | × | d | + | 5 | d | = | 0 |
3 | + | 8 | d | + | 1 | ÷ | d | × | d | = | 0 |
8 | d | = | 0 | − | 3 | − | 1 | ÷ | 1 | × | 1 |
8 | d | = | 0 | − | 3 | − | 1 |
8 | d | = | - | 4 |
d | = | - | 4 | ÷ | 8 |
= | - | 4 | × | 1 8 |
= | - | 1 | × | 1 2 |
d | = | - | 1 2 |
d | = | - 0.5 |