A.有最大值
| B.有最大值-
| ||||
C.有最小值
| D.有最小值-
|
|
15 |
2 |
A.在(0,+∞)上递增 | B.在(0,+∞)上递减 | ||||
C.在(0,
| D.在(0,
|
A.(-∞,0) | B.(0,+∞) | C.(-∞,-1),(1,+∞) | D.(-1,1) |
1 |
x |
A.(0,+∞) | B.(-∞,1) | C.(
| D.(1,+∞) |
A.(-∞,-1) | B.(-∞,0) | C.(0,+∞) | D.(-1,+∞) |
A.(0,e) | B.(e,+∞) | C.(0,
| D.(
|
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