π |
2 |
A.
| B.
| C.
| D.以上都不对 |
π |
2 |
1 |
2 |
1 |
2 |
π |
2 |
2π |
3 |
1 |
2 |
2π |
3 |
1 |
2 |
2π |
3 |
| ||
2 |
2π |
3 |
3 |
A.12,-15 | B.-4,-15 | C.12,-4 | D.5,-15 |
A.[-3,3] | B.[-4,3] | C.[-3,43] | D.[4,4] |
| ||
x-1 |
A.(-∞,1)∪(1,2] | B.(-∞,1)∪(1,2) | C.(-∞,2] | D.(-∞,1)∪(1,+∞) |
1-x2 |
x2-1 |
A.[-1,1] | B.(-∞,1]∪[1,+∞) | C.[0,1] | D.{-1,1} |
A.y=31-x | B.y=
| C.y=7
| D.y=log2(x-3) |
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