A.
| B.
| ||||||||||||
C.
| D.
|
1 |
3a |
1 |
3b |
a+b |
3ab |
b |
a |
b+1 |
a |
1 |
a |
1 |
a-b |
1 |
b-a |
1-1 |
a-b |
m |
a |
m |
b |
mb+ma |
ab |
a-2 |
a2-1 |
2 |
1-a |
a-2 |
(a+1)(a-1) |
2 |
(a-1) |
a-2 |
(a+1)(a-1) |
2(a+1) |
(a+1)(a-1) |
2 |
1-a |
1 |
a-1 |
4 |
a2-4 |
1 |
a+2 |
1 |
2-a |
A.M=N | B.MN=1 | C.M+N=0 | D.不能确定 |
4 |
m-4 |
m |
4-m |
1-3x |
x2-1 |
M |
x+1 |
N |
x-1 |
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