问题
选择题
若偶函数f（x）在（0，+∞）上是增函数，则a=f(-
|
答案
∵f（x）是偶函数
∴f(-
)=f(2
)2
又∵f（x）在（0，+∞）上是增函数且
＜ 2
＜3 2 π 2
∴a＜c＜b
故选C
搜题请搜索小程序“爱下问搜题”
若偶函数f（x）在（0，+∞）上是增函数，则a=f(-
|
∵f（x）是偶函数
∴f(-
)=f(2
)2
又∵f（x）在（0，+∞）上是增函数且
＜ 2
＜3 2 π 2
∴a＜c＜b
故选C
| within just lost their lives in their twenties put out |
B: Not yet. When and where did the fire happen?
A: It happened on May 1st in Shanghai.
B: Did the firemen 小题1: the fire soon?
A: Yes. The firemen reached the burning building 小题2: six minutes.
B: Was anybody hurt in the fire?
A: Two firemen 小题3: in the fire.
B: I am sorry to hear that.
A: These two firemen are very young. Both of them are 小题4: .
B: I am very sad. They are 小题5: several years older than us.
A: I have the same feeling. Fire is really terrible. Everyone should be careful with it.