1 |
x-1 |
2+x |
A.[-2,+∞) | B.(-∞,-2] | C.R | D.[-2,1)∪(1,+∞) |
|
3x2 | ||
|
2 | ||
|
A.[-
| B.(-
| C.(-
| D.(-∞,-
|
| ||
x-1 |
mx2+mx+1 |
| ||
x-2 |
A.[-3,1] | B.(-3,3) | C.(-3,2)∪(2,3) | D.[-3,2)∪(2,3] |
-x2-6x-5 |
(x+1)2(x-1) |
x-1 |
A.[0,+∞) | B.[0,4)∪(4,+∞) | C.(-∞,1)∪(1,+∞) | D.[0,1)∪(1,+∞) |
© 2017-2019 超级试练试题库,All Rights Reserved.