1 |
1-a |
1 |
a2 |
A.
| B.-
| C.
| D.-
|
1 |
1-a |
1 |
a2 |
1-a-1 |
1-a |
1-a2 |
a2 |
-a |
1-a |
(1+a)(1-a) |
a2 |
a+1 |
a |
2 |
3 |
x2-2x+1 |
x2-1 |
2x-2 |
x+1 |
x2-x+2
| ||
(x2-x)2-1+
|
A.
| B.
| C.
| D.
|
12 |
x+2 |
4-x |
x+2 |
x-2 |
x2-1 |
2x+2 |
x2+2x+1 |
1 |
x-1 |
a2-4 |
a2-4a+4 |
1 |
2-a |
2 |
a2-2a |
© 2017-2019 超级试练试题库,All Rights Reserved.