1 |
x |
A.(-1,1) | B.(-1,0)∪(0,1) | C.(-1,0),(0,1) | D.(-ω,-1),(1,+ω) |
1 |
x |
1 |
x2 |
1 |
x2 |
A.1 | B.-1 | C.3 | D.-3 |
|
A.O | B.1 | C.2 | D.3 |
1 |
x |
A.(-1,1) | B.(0,1) | C.(-1,0)∪(0,1) | D.(-∞,-1)∪(1,+∞) |
1-x |
x |
1 |
2 |
A.1 | B.3 | C.15 | D.30 |
1 |
x |
A.ab>1 | B.a<1<b | C.a+1<b | D.a+1>b |
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