1 |
log2(x-1) |
A.(-∞,1) | B.(1,+∞) | C.(1,3)∪(3,+∞) | D.(1,2)∪(2,+∞) |
|
|
A.1 | B.2 | C.3 | D.4 |
lgx |
A.[0,
| B.[0,
| C.[1,
| D.[1,
|
A.a<b<c | B.c<b<a | C.b<a<c | D.c<a<b |
A.(-∞,-1)∪(3,+∞) | B.(-∞,-3)∪(1,+∞) | C.(-3,1) | D.(-1,3) |
A.{x|x≤3,x∈R} | B.{x|x≥3,x∈R} | C.{x|x>3,x∈R} | D.{x|x<3,x∈R} |
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