4 |
x |
A.
| B.
| C.1 | D.
|
4 |
x |
4 |
x |
4 |
x |
4 |
x |
13 |
3 |
x |
x+1 |
A.-
| B.-2
| C.-
| D.-2
|
2-x |
A.{x|x≤2} | B.{x|0≤x≤2} | C.{x|x≥2或x≤0} | D.{x|x≥0} |
loga(3x-2x2) |
A.(-∞,
| B.[
| C.(0,
| D.(0,
|
A.x-[x]≥0 | B.y=x-[x]没有最大值 |
C.y=x-[x]是周期函数 | D.y=x-[x]是偶函数 |
1 |
x |
A.4 | B.3 | C.2
| D.1 |
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