9-x2 |
9-x2 |
2 |
π |
4 |
π |
4 |
π |
4 |
5π |
4 |
π |
4 |
| ||
2 |
2 |
π |
4 |
2 |
9-x2 |
2 |
2 |
A.[-4
| B.[-4
| C.[4,4
| D.[4,9] |
2x |
2x+1 |
-x2+2x+3 |
A.[-1,3) | B.[-1,3] | C.(-1,3) | D.(-∞,-1]∪[3,+∞) |
|
A.[-3,1) | B.(2,3) | C.(3,+∞) | D.(1,2) |
A.(1,+∞) | B.[1,+∞) | C.(2,+∞) | D.[2,+∞) |
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