关于函数
,有下列四个结论,其中正确结论的个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49a20de62a8a0e8e05fd61b71ae36298.png)
A.![]() |
B.![]() ![]() |
C.![]() ![]() |
D.当![]() ![]() |
更新时间:2016-12-04 01:40:49
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】已知函数
是定义在
上的奇函数,且
时,
.给出下列命题:
①当
时
;
②函数
有三个零点;
③
的解集为
;
④
都有
.其中正确的命题有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/869d6481a856073401ecdad6bd491c9b.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453082cd77b73badabd201fa3a6808b9.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ae31ccf78fd5b78399f341cd0ebcae.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aae2c13ad91dae29cf4d9f794a8808dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365cfeaa559bbe0b274a4d4a9338cb4f.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】设奇函数
在
上是增函数,且
,若函数
对所有的
都成立,当
时,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417ab20883d799aaf311371393fa7d7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40aa8429b2b7d252700f2813c259592d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f4f4a5c7d050086cd21767c37e17670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f0ca536621ec8db02707ba65917029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262d7da8f17131eef23addd1854b170d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() |
C.![]() ![]() ![]() | D.![]() ![]() ![]() |
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解题方法
【推荐1】已知定义在
上的三个函数
,其中
为偶函数,
是奇函数,且
在
上单调递增,
在
上单调递增,
在
上单调递减,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41cf8045f98c4259ac1bde90cc9d840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bfdb24ecf5da863405c2b40936ff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c25767d88e8415b86648867444bb6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bfdb24ecf5da863405c2b40936ff9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26eecab1279386ce6ecf186592132356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4e318eba446aef74e47ff27fda7bc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eade20fc55d78aba17d91cddf4cf3c1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
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【推荐2】已知函数
,给出下列结论:
①
的最小正周期为
: ②
是奇函数:
③
的值域为
; ④
在
上单调递增.
其中所有正确结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59632525dac95bc3511a6b8c024697c6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e2d7c958e99bcd9d7f251c19ee3544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d08ae2f7e9fefca425d083ee9a2ec86a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527a9819edc476ee245b7bb7cfe19473.png)
其中所有正确结论的序号是( )
A.①② | B.③④ | C.①③④ | D.②③④ |
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【推荐1】关于函数
有下述四个结论:①
的周期为
;②
在
上单调递增;③函数
在
上有3个零点;④函数
的最小值为
.其中所有正确结论的编号为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5d0fa5d457e5d268c29debccfcde65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b874676f40acc855b8c83dc897090c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3033291263ef14fbb35ae296117337b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a9845c78cb0cdedddefb2c0309a86e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9db9373e74ecf5d63ad98afe66aa4ba.png)
A.①④ | B.②③ | C.①③④ | D.②④ |
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【推荐2】已知函数
(
,
)的部分图象如图所示,则( )
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705561437741056/2806355700097024/STEM/996b298c1c804b1d9ce063550f88ad8b.png?resizew=210)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a312819dea052efdc3b19ce94b2f6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13378be06b6b01bcad1d261ff14e87cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb61a448347a3f8c1f126d1c00730cc0.png)
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705561437741056/2806355700097024/STEM/996b298c1c804b1d9ce063550f88ad8b.png?resizew=210)
A.![]() | B.点![]() ![]() |
C.![]() | D.直线![]() ![]() |
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解题方法
【推荐1】已知
,
,那么
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7251a923e0453c036b10ee0091568b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea0cbbdf75467b5c19c7aba6fc2d2ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d72464b66dd0d8e35488916739680dc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
【推荐2】已知
,则
等于( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe22489fc040b51a46f15b27ce79c69d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbeb6ffa9de667926d21b55b8e5923c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次