总述:本次共解1题。其中
☆方程1题
〖 1/1方程〗
作业:求方程 (x+7)/(x+6)+(x+8)/(x+9) = (x+10)/(x+9)+(x+6)/(x+5) 的解.
题型:方程
解:原方程:| | ( | x | + | 7 | ) | ÷ | ( | x | + | 6 | ) | + | ( | x | + | 8 | ) | ÷ | ( | x | + | 9 | ) | = | ( | x | + | 10 | ) | ÷ | ( | x | + | 9 | ) | + | ( | x | + | 6 | ) | ÷ | ( | x | + | 5 | ) |
| 方程两边同时乘以: | ( | x | + | 6 | ) | , | ( | x | + | 9 | ) |
| | ( | x | + | 7 | ) | ( | x | + | 9 | ) | + | ( | x | + | 8 | ) | ( | x | + | 6 | ) | = | ( | x | + | 10 | ) | ( | x | + | 6 | ) | + | ( | x | + | 6 | ) | ÷ | ( | x | + | 5 | ) | × | ( | x | + | 6 | ) | ( | x | + | 9 | ) |
去掉方程左边的一个括号:
| | x | ( | x | + | 9 | ) | + | 7 | ( | x | + | 9 | ) | + | ( | x | + | 8 | ) | ( | x | + | 6 | ) | = | ( | x | + | 10 | ) | ( | x | + | 6 | ) | + | ( | x | + | 6 | ) | ÷ | ( | x | + | 5 | ) | × | ( | x | + | 6 | ) | ( | x | + | 9 | ) |
去掉方程右边的一个括号:
| | x | ( | x | + | 9 | ) | + | 7 | ( | x | + | 9 | ) | + | ( | x | + | 8 | ) | ( | x | + | 6 | ) | = | x | ( | x | + | 6 | ) | + | 10 | ( | x | + | 6 | ) | + | ( | x | + | 6 | ) | ÷ | ( | x | + | 5 | ) | × | ( | x | + | 6 | ) | ( | x | + | 9 | ) |
| | x | ( | x | + | 9 | ) | ( | x | + | 5 | ) | + | 7 | ( | x | + | 9 | ) | ( | x | + | 5 | ) | + | ( | x | + | 8 | ) | ( | x | + | 6 | ) | ( | x | + | 5 | ) | = | x | ( | x | + | 6 | ) | ( | x | + | 5 | ) | + | 10 | ( | x | + | 6 | ) | ( | x | + | 5 | ) | + | ( | x | + | 6 | ) | ( | x | + | 6 | ) | ( | x | + | 9 | ) |
去掉方程左边的一个括号:
| | x | x | ( | x | + | 5 | ) | + | x | × | 9 | ( | x | + | 5 | ) | + | 7 | ( | x | + | 9 | ) | ( | x | + | 5 | ) | + | ( | x | + | 8 | ) | ( | x | + | 6 | ) | ( | x | + | 5 | ) | = | x | ( | x | + | 6 | ) | ( | x | + | 5 | ) | + | 10 | ( | x | + | 6 | ) | ( | x | + | 5 | ) | + | ( | x | + | 6 | ) | ( | x | + | 6 | ) | ( | x | + | 9 | ) |
去掉方程右边的一个括号:
| | x | x | ( | x | + | 5 | ) | + | x | × | 9 | ( | x | + | 5 | ) | + | 7 | ( | x | + | 9 | ) | ( | x | + | 5 | ) | + | ( | x | + | 8 | ) | ( | x | + | 6 | ) | ( | x | + | 5 | ) | = | x | x | ( | x | + | 5 | ) | + | x | × | 6 | ( | x | + | 5 | ) | + | 10 | ( | x | + | 6 | ) | ( | x | + | 5 | ) | + | ( | x | + | 6 | ) | ( | x | + | 6 | ) | ( | x | + | 9 | ) |
去掉方程左边的一个括号:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | ( | x | + | 5 | ) | + | 7 | ( | x | + | 9 | ) | ( | x | + | 5 | ) | = | x | x | ( | x | + | 5 | ) | + | x | × | 6 | ( | x | + | 5 | ) | + | 10 | ( | x | + | 6 | ) | ( | x | + | 5 | ) | + | ( | x | + | 6 | ) | ( | x | + | 6 | ) | ( | x | + | 9 | ) |
去掉方程右边的一个括号:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | ( | x | + | 5 | ) | + | 7 | ( | x | + | 9 | ) | ( | x | + | 5 | ) | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | ( | x | + | 5 | ) | + | 10 | ( | x | + | 6 | ) | ( | x | + | 5 | ) |
去掉方程左边的一个括号:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | x | × | 9 | × | 5 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | ( | x | + | 5 | ) | + | 10 | ( | x | + | 6 | ) | ( | x | + | 5 | ) |
去掉方程右边的一个括号:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | x | × | 9 | × | 5 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | x | × | 6 | × | 5 |
方程化简为:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | x | × | 45 | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | x | × | 30 | + | 10 |
去掉方程左边的一个括号:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | 45 | x | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | 30 | x | + | 10 |
去掉方程右边的一个括号:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | 45 | x | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | 30 | x | + | 10 |
方程化简为:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | 45 | x | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | 30 | x | + | 10 |
去掉方程左边的一个括号:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | 45 | x | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | 30 | x | + | 10 |
去掉方程右边的一个括号:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | 45 | x | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | 30 | x | + | 10 |
方程化简为:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | 45 | x | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | 30 | x | + | 10 |
方程化简为:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | 80 | x | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | 80 | x | + | 10 |
去掉方程左边的一个括号:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | 80 | x | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | 80 | x | + | 10 |
去掉方程右边的一个括号:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | 80 | x | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | 80 | x | + | 10 |
方程化简为:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | 80 | x | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | 80 | x | + | 10 |
方程化简为:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | 143 | x | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | 140 | x | + | 10 |
去掉方程左边的一个括号:
| | x | x | x | + | x | x | × | 5 | + | x | × | 9 | x | + | 143 | x | + | 7 | = | x | x | x | + | x | x | × | 5 | + | x | × | 6 | x | + | 140 | x | + | 10 |
有 0个解。
解程的详细方法请参阅:《方程的解法》
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