x |
ex |
A.[-1,0] | B.[2,8] | C.[1,2] | D.[0,2] |
ex-xex |
e2x |
1 |
3 |
A.(-∞,0) | B.(-∞,0] | C.(-∞,1) | D.(-∞,1] |
A.0 | B.1 | C.2 | D.3 |
A.有最大值
| B.有最大值-
| ||||
C.有最小值
| D.有最小值-
|
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) |
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