A.
| B.
| ||||||||||||
C.
| D.
|
1 |
8x |
1 |
8y |
x+y |
8xy |
y |
x |
y |
z |
yz+xy |
xz |
x |
2y |
x+1 |
2y |
2x+1 |
2y |
1 |
x-y |
1 |
y-x |
1 |
x-y |
1 |
x-y |
1 |
x-1 |
2 |
x2-1 |
a-1 |
a |
1 |
a |
a |
a+1 |
b |
b+1 |
1 |
a+1 |
1 |
b+1 |
A.M>N | B.M=N | C.M<N | D.无法确定 |
a |
a3+a2b+ab2+b3 |
b |
a3-a2b+ab2-b3 |
1 |
a2-b2 |
1 |
b2+a2 |
a2+3b2 |
a4-b4 |
2x-3 |
x2-x |
A |
x-1 |
B |
x |
A.-2 | B.2 | C.-4 | D.4 |
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