ex |
a |
a |
ex |
A.-2 | B.-1 | C.1 | D.2 |
ex |
a |
a |
ex |
e-x |
a |
a |
e-x |
1 |
aex |
aex |
1 |
ex |
a |
a |
ex |
1 |
aex |
a |
ex |
aex |
1 |
ex |
a |
1 |
a |
x |
A.(-3,3) | B.(3,+∞) | C.(-∞,3) | D.(-∞,3)∪(3,+∞) |
2 |
x |
A.减函数且最小值是2 | B..减函数且最大值是2 |
C.增函数且最小值是2 | D.增函数且最大值是2 |
x+y |
1+xy |
1-x |
1+x |
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