2x+1 |
x2 |
2x+1 |
x2 |
2x+1 |
x2 |
1 |
2 |
1 |
2 |
2x+1 |
x2 |
2 |
x |
x+y |
5 |
1 |
2-a |
x |
π-1 |
A.(1)(2) | B.(3)(4) | C.(1)(3) | D.(1)(2)(3)(4) |
A.
| B.
| C.
| D.
|
x+2 |
x-2 |
x-2 |
x+2 |
(x+2)(x+3) |
(x-2)(x-3) |
(x-2)(x+3) |
(x+2)(x-3) |
A.(1)(2) | B.(3)(4) | C.(1)(3) | D.(2)(4) |
A.3+
| ||
B.无论x取何值,分式
| ||
C.分式
| ||
D.
|
x-1 |
2x+1 |
9-m2 |
m+3 |
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