总述:本次共解1题。其中
☆方程1题
〖 1/1方程〗
作业:求方程 -400+559/(1+x)+398/(1+x)/(1+x)+1501/(1+x)/(1+x)/(1+x)+1629/(1+x)/(1+x)/(1+x)/(1+x)+1449/(1+x)/(1+x)/(1+x)/(1+x)/(1+x) = 0 的解.
题型:方程
解:原方程:| | - | 400 | + | 559 | ÷ | ( | 1 | + | x | ) | + | 398 | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | + | 1501 | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | + | 1629 | ÷ | ( | 1 | + | x | ) | = | 0 |
| | - | 400 | ( | 1 | + | x | ) | + | 559 | + | 398 | ÷ | ( | 1 | + | x | ) | + | 1501 | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | + | 1629 | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | = | 0 |
去掉方程左边的一个括号:
| | - | 400 | × | 1 | − | 400 | x | + | 559 | + | 398 | ÷ | ( | 1 | + | x | ) | + | 1501 | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | + | 1629 | ÷ | ( | 1 | + | x | ) | = | 0 |
方程化简为:
| | - | 400 | − | 400 | x | + | 559 | + | 398 | ÷ | ( | 1 | + | x | ) | + | 1501 | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | + | 1629 | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | = | 0 |
方程化简为:
| | 159 | − | 400 | x | + | 398 | ÷ | ( | 1 | + | x | ) | + | 1501 | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | + | 1629 | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | = | 0 |
| | 159 | ( | 1 | + | x | ) | − | 400 | x | ( | 1 | + | x | ) | + | 398 | + | 1501 | ÷ | ( | 1 | + | x | ) | + | 1629 | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | + | 1449 | = | 0 |
去掉方程左边的一个括号:
| | 159 | × | 1 | + | 159 | x | − | 400 | x | ( | 1 | + | x | ) | + | 398 | + | 1501 | ÷ | ( | 1 | + | x | ) | + | 1629 | ÷ | ( | 1 | + | x | ) | = | 0 |
方程化简为:
| | 159 | + | 159 | x | − | 400 | x | ( | 1 | + | x | ) | + | 398 | + | 1501 | ÷ | ( | 1 | + | x | ) | + | 1629 | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | = | 0 |
方程化简为:
| | 557 | + | 159 | x | − | 400 | x | ( | 1 | + | x | ) | + | 1501 | ÷ | ( | 1 | + | x | ) | + | 1629 | ÷ | ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | ) | + | 1449 | = | 0 |
| | 557 | ( | 1 | + | x | ) | + | 159 | x | ( | 1 | + | x | ) | − | 400 | x | ( | 1 | + | x | ) | ( | 1 | + | x | ) | + | 1501 | + | 1629 | ÷ | ( | 1 | + | x | ) | = | 0 |
去掉方程左边的一个括号:
| | 557 | × | 1 | + | 557 | x | + | 159 | x | ( | 1 | + | x | ) | − | 400 | x | ( | 1 | + | x | ) | ( | 1 | + | x | ) | + | 1501 | = | 0 |
方程化简为:
| | 557 | + | 557 | x | + | 159 | x | ( | 1 | + | x | ) | − | 400 | x | ( | 1 | + | x | ) | ( | 1 | + | x | ) | + | 1501 | + | 1629 | = | 0 |
方程化简为:
| | 2058 | + | 557 | x | + | 159 | x | ( | 1 | + | x | ) | − | 400 | x | ( | 1 | + | x | ) | ( | 1 | + | x | ) | + | 1629 | ÷ | ( | 1 | + | x | ) | = | 0 |
| | 2058 | ( | 1 | + | x | ) | + | 557 | x | ( | 1 | + | x | ) | + | 159 | x | ( | 1 | + | x | ) | ( | 1 | + | x | ) | − | 400 | x | ( | 1 | + | x | ) | = | 0 |
去掉方程左边的一个括号:
| | 2058 | × | 1 | + | 2058 | x | + | 557 | x | ( | 1 | + | x | ) | + | 159 | x | ( | 1 | + | x | ) | ( | 1 | + | x | ) | − | 400 | = | 0 |
方程化简为:
| | 2058 | + | 2058 | x | + | 557 | x | ( | 1 | + | x | ) | + | 159 | x | ( | 1 | + | x | ) | ( | 1 | + | x | ) | − | 400 | x | = | 0 |
方程化简为:
| | 3687 | + | 2058 | x | + | 557 | x | ( | 1 | + | x | ) | + | 159 | x | ( | 1 | + | x | ) | ( | 1 | + | x | ) | − | 400 | x | = | 0 |
| | 3687 | ( | 1 | + | x | ) | + | 2058 | x | ( | 1 | + | x | ) | + | 557 | x | ( | 1 | + | x | ) | ( | 1 | + | x | ) | + | 159 | x | ( | 1 | + | x | ) | = | 0 |
去掉方程左边的一个括号:
| | 3687 | × | 1 | + | 3687 | x | + | 2058 | x | ( | 1 | + | x | ) | + | 557 | x | ( | 1 | + | x | ) | ( | 1 | + | x | ) | + | 159 | = | 0 |
方程化简为:
| | 3687 | + | 3687 | x | + | 2058 | x | ( | 1 | + | x | ) | + | 557 | x | ( | 1 | + | x | ) | ( | 1 | + | x | ) | + | 159 | x | = | 0 |
方程化简为:
| | 5136 | + | 3687 | x | + | 2058 | x | ( | 1 | + | x | ) | + | 557 | x | ( | 1 | + | x | ) | ( | 1 | + | x | ) | + | 159 | x | = | 0 |
去掉方程左边的一个括号:
| | 5136 | + | 3687 | x | + | 2058 | x | × | 1 | + | 2058 | x | x | + | 557 | x | ( | 1 | + | x | ) | = | 0 |
x≈1.623745 ,保留6位小数
有 1个解。
解一元一次方程的详细方法请参阅:《一元一次方程的解法》
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