2 |
x |
a+2b |
2 |
a+b |
π |
a+1 |
a |
(x-1)(x+2) |
x+2 |
| ||
b |
A.2 | B.3 | C.4 | D.5 |
a+2b |
2 |
a+b |
π |
| ||
b |
2 |
x |
a+1 |
a |
(x-1)(x+2) |
x+2 |
x2-4 |
x-2 |
π+1 |
π |
A.①是整式,②是分式 | B.①②都是分式 |
C.①是分式,②是整式 | D.①②都是整式 |
x2 |
x-3 |
A.x>3 | B.x>-3 | C.x≠0 | D.x≠3 |
2 |
x-3 |
A.
| B.
| C.
| D.
|
3a+b |
a-b |
A.a=b | B.a=b,但a、b不都为零 |
C.a≠b | D.a≠b,且a、b都不为零 |
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