A.{a∈R|-1<a<
| B.{a∈R|a>
| ||||
C.{a∈R|a<-1或a>
| D.{a∈R|a<-1} |
1 |
3 |
3x |
2 |
x |
2 |
3x |
2 |
x |
2 |
π |
2 |
|
A.当a>0时,有4个零点;当a<0时,有1个零点 |
B.当a>0时,有3个零点;当a<0时,有2个零点 |
C.无论a为何值,均有2个零点 |
D.无论a为何值,均有4个零点 |
|
A.4 | B.3 | C.2 | D.1 |
1 |
2 |
A.1或-1 | B.-
| C.
| D.1 |
π |
4 |
π |
2 |
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