1 |
a |
2 |
a+b |
x+y |
2 |
1 |
π |
x2 |
x |
2 |
3 |
1 |
a |
2 |
a+b |
x2 |
x |
| ||
x-3 |
A.x≥-1 | B.x>-1 | C.x≥1且x≠3 | D.x≥-1且x≠3 |
2x+a |
3x-4 |
A.x=
| B.x=-
| ||||||||
C.x=-
| D.x=-
|
3x+5 |
x-1 |
5 |
3m-2x |
1 |
2m-x |
2 |
x |
x+y |
5 |
1 |
2-a |
x2y2 |
3-π |
A.①② | B.③④ | C.①③ | D.①②③④ |
3 |
(x-1)(x-2) |
A.x≠1 | B.x≠2 | C.x≠1且x≠2 | D.x≠-1或x≠-2 |
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