总述:本次共解1题。其中
☆方程1题
〖 1/1方程〗
作业:求方程 19800+220500-(88200+73500*x)*(5*x/4+3-2/3*((75/16*x*x+45/4*x+9)/(5/2*x+3))) = 0 的解.
题型:方程
解:原方程:| | 19800 | + | 220500 | − | ( | 88200 | + | 73500 | x | ) | ( | 5 | x | ÷ | 4 | + | 3 | − | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | ) | = | 0 |
去掉方程左边的一个括号:
| | 19800 | + | 220500 | − | 88200 | ( | 5 | x | ÷ | 4 | + | 3 | − | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | ) | − | 73500 | x | ( | 5 | x | ÷ | 4 | + | 3 | − | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | ) | = | 0 |
方程化简为:
| | 240300 | − | 88200 | ( | 5 | x | ÷ | 4 | + | 3 | − | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | ) | − | 73500 | x | ( | 5 | x | ÷ | 4 | + | 3 | − | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | ) | = | 0 |
去掉方程左边的一个括号:
| | 240300 | − | 88200 | × | 5 | x | ÷ | 4 | − | 88200 | × | 3 | + | 88200 | × | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | − | 73500 | = | 0 |
方程化简为:
| | 240300 | − | 110250 | x | − | 264600 | + | 58800 | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | − | 73500 | x | ( | 5 | x | ÷ | 4 | + | 3 | − | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | ) | = | 0 |
方程化简为:
| | - | 24300 | − | 110250 | x | + | 58800 | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | − | 73500 | x | ( | 5 | x | ÷ | 4 | + | 3 | − | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | ) | = | 0 |
去掉方程左边的一个括号:
| | - | 24300 | − | 110250 | x | + | 58800 | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | − | 73500 | x | ( | 5 | x | ÷ | 4 | + | 3 | − | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | ) | = | 0 |
| | - | 24300 | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | − | 110250 | x | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | + | 58800 | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | − | 73500 | x | ( | 5 | x | ÷ | 4 | + | 3 | − | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | ) | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | = | 0 |
去掉方程左边的一个括号:
| | - | 24300 | × | 5 | ÷ | 2 | × | x | − | 24300 | × | 3 | − | 110250 | x | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | + | 58800 | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | − | 73500 | = | 0 |
方程化简为:
| | - | 60750 | x | − | 72900 | − | 110250 | x | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | + | 58800 | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | − | 73500 | x | ( | 5 | x | ÷ | 4 | + | 3 | − | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | ) | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | = | 0 |
去掉方程左边的一个括号:
| | - | 60750 | x | − | 72900 | − | 110250 | x | × | 5 | ÷ | 2 | × | x | − | 110250 | x | × | 3 | + | 58800 | = | 0 |
方程化简为:
| | - | 60750 | x | − | 72900 | − | 275625 | x | x | − | 330750 | x | + | 58800 | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | − | 73500 | x | = | 0 |
方程化简为:
| | - | 391500 | x | − | 72900 | − | 275625 | x | x | + | 58800 | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | − | 73500 | x | ( | 5 | x | ÷ | 4 | + | 3 | − | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | ) | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | = | 0 |
去掉方程左边的一个括号:
| | - | 391500 | x | − | 72900 | − | 275625 | x | x | + | 58800 | × | 75 | ÷ | 16 | × | x | x | + | 58800 | = | 0 |
方程化简为:
| | - | 391500 | x | − | 72900 | − | 275625 | x | x | + | 275625 | x | x | + | 661500 | x | + | 529200 | = | 0 |
方程化简为:
| | 270000 | x | + | 456300 | − | 275625 | x | x | + | 275625 | x | x | − | 73500 | x | ( | 5 | x | ÷ | 4 | + | 3 | − | 2 | ÷ | 3 | × | ( | ( | 75 | ÷ | 16 | × | x | x | + | 45 | ÷ | 4 | × | x | + | 9 | ) | ÷ | ( | 5 | ÷ | 2 | × | x | + | 3 | ) | ) | ) | = | 0 |
去掉方程左边的一个括号:
| | 270000 | x | + | 456300 | − | 275625 | x | x | + | 275625 | x | x | − | 73500 | x | × | 5 | = | 0 |
方程化简为:
| | 270000 | x | + | 456300 | − | 275625 | x | x | + | 275625 | x | x | − | 91875 | x | x | = | 0 |
去掉方程左边的一个括号:
| | 270000 | x | + | 456300 | − | 275625 | x | x | + | 275625 | x | x | − | 91875 | x | x | = | 0 |
方程化简为:
| | 270000 | x | + | 456300 | − | 275625 | x | x | + | 275625 | x | x | − | 459375 2 | x | x | = | 0 |
去掉方程左边的一个括号:
| | 270000 | x | + | 456300 | − | 275625 | x | x | + | 275625 | x | x | − | 459375 2 | x | x | = | 0 |
方程化简为:
| | 270000 | x | + | 456300 | − | 275625 | x | x | + | 275625 | x | x | − | 459375 2 | x | x | = | 0 |
方程化简为:
| | - | 391500 | x | + | 456300 | − | 275625 | x | x | + | 275625 | x | x | − | 459375 2 | x | x | = | 0 |
去掉方程左边的一个括号:
| | - | 391500 | x | + | 456300 | − | 275625 | x | x | + | 275625 | x | x | − | 459375 2 | x | x | = | 0 |
方程的解为:
x≈1.379592 ,保留6位小数
有 1个解。
解方程的详细方法请参阅:《方程的解法》
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