a |
b |
c |
d |
e |
f |
3 |
4 |
a+c+e |
b+d+f |
x-2y |
y |
2 |
3 |
x |
y |
a+c+e |
b+d+f |
3x+3y+3z |
4x+4y+4z |
3 |
4 |
x |
y |
8 |
3 |
3 |
4 |
8 |
3 |
A.
| ||||
B.
| ||||
C.
| ||||
D.
|
x+y |
1-xy |
A.相等 | B.互为相反数 | C.互为倒数 | D.乘积为-1 |
x |
4 |
y |
3 |
z |
2 |
x-y+3z |
x |
x |
x-1 |
1 |
1-x |
a2+2a |
a |
y |
2x |
x |
3y2 |
1 |
4xy |
x |
2(x+1) |
1 |
x2-x |
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