x2-1 |
x-1 |
A.x=1 | B.x=-1 | C.x=±1 | D.x≠1 |
1 |
a |
2xy |
π |
3a2b3c |
4 |
5 |
6+x |
x |
7 |
y |
8 |
10 |
y |
A.2个 | B.3个 | C.4个 | D.5个 |
2 |
x-5 |
A.x≠5 | B.x≠-5 | C.x>5 | D.x>-5 |
x+a |
3x-2 |
A.分式的值为零 | ||
B.当a≠-
| ||
C.分式无意义 | ||
D.当a=
|
x-2y |
x+2y |
A.-
| B.-
| C.
| D.
|
x-2 |
x-1 |
A.x<1 | B.x>2 | C.x>1且x≠2 | D.1<x<2 |
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