2x+3 |
x(x−1)(x+2) |
A |
x |
B |
x−1 |
C |
x+2 |
A |
x |
B |
x−1 |
C |
x+2 |
A(x−1)(x+2)+Bx(x+2)+Cx(x−1) |
x(x−1)(x+2) |
(A+B+C)x2+(A+2B−C)x−2A |
x(x−1)(x+2) |
2x+3 |
x(x−1)(x+2) |
|
|
3 |
2 |
5 |
3 |
1 |
6 |
A |
x |
B |
x−1 |
C |
x+2 |
|
分式的加减法.
此题考查了分式的加减运算法则与三元一次方程组的解法.此题难度适中,注意掌握整式相等的条件是解此题的关键.
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