题目
题型:解答题难度:一般来源:广安
x-1 |
x2+x |
2x |
x+1 |
答案
x-1 |
x(x+1) |
2x |
x+1 |
方程两边同时乘以x(x+1),得x-1+2x(x+1)=2x2
化简得3x-1+2x2=2x2
解得x=
1 |
3 |
检验:当x=
1 |
3 |
∴原方程的解是x=
1 |
3 |
核心考点
举一反三
x2-2 |
x |
2x |
x2-2 |
x2-2 |
x |
x-1 |
x2+x |
2x |
x+1 |
x-1 |
x(x+1) |
2x |
x+1 |
1 |
3 |
1 |
3 |
1 |
3 |
x2-2 |
x |
2x |
x2-2 |
x2-2 |
x |