名校
1 . 有下列四个说法:
①已知向量
,
,若
与
的夹角为钝角,则
;
②若函数
的图象关于直线
对称,则
;
③函数
在
上单调递减,在
上单调递增;
④当
时,函数
有四个零点.
其中正确的是___________ (填上所有正确说法的序号)
①已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6569e50f43b3d8645652ecc13b62066e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3471223fbd8d687ea4e37ee7aa632772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d1eec645764636c0e23b05e8f93234.png)
②若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a4ec68a8c6980548502e08d0a3b25c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24db7b603aebdee8e298d1fe49c848e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb52d91a9b9e084e6e4f0aa0a4a1bd96.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78cfb9361b23e62c80cc5ce46519b42f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e4b97703638756a4051a3dd0cdcf5a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c9aeed3c8c5a04e48d011c607f9142.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbc7b35682426aab8bd896a9ce35a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8fcc34ffbe1d57405482aa8308cbc2.png)
其中正确的是
您最近一年使用:0次
2022-04-11更新
|
157次组卷
|
2卷引用:甘肃省武威市凉州区2021-2022学年高一下学期期中质量检测数学试题
2 . 有下列几个说法:
(1)函数
在
上不是增函数;
(2)函数
在
上是减函数;
(3)函数
的单调递减区间是
;
(4)已知
在R上是增函数,若
,则有
.
其中正确说法的序号是___________ .
(1)函数
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392016166912/1572392021901312/STEM/615694f6424943318b2e74f02a3512a6.png?resizew=96)
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392016166912/1572392021901312/STEM/ed28cf30b9684a2ca8efb6d883ff0255.png?resizew=47)
(2)函数
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392016166912/1572392021901312/STEM/9024654c80f84641add88d9f8c0a3294.png?resizew=60)
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392016166912/1572392021901312/STEM/a36c936f1c664da9af2fc8a7d9c28f7e.png?resizew=124)
(3)函数
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392016166912/1572392021901312/STEM/985f73e0b48a4c2da3c63f6d730450fe.png?resizew=109)
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392016166912/1572392021901312/STEM/44d4fd23c70b4848ae90e883af5a6b59.png?resizew=45)
(4)已知
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392016166912/1572392021901312/STEM/c28e5c93ec0f4be7886599f727184502.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392016166912/1572392021901312/STEM/fb568a48bc994fd69ad151ee49c0dba7.png?resizew=59)
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572392016166912/1572392021901312/STEM/58248b20ea2e44178667ea041955ff48.png?resizew=188)
其中正确说法的序号是
您最近一年使用:0次
12-13高一上·甘肃天水·期中
解题方法
3 . 下列5个判断:
①若
在
上增函数,则
;
②函数
只有两个零点;
③函数
的值域是
;
④函数
的最小值是1;
⑤在同一坐标系中函数
与
的图像关于
轴对称.
其中正确命题的序号_______
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4b369f86d13d19556d0ae4f7aece51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03db4ea1dcb63b22cf4e917df5db581e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c298e3b72856ab70082079d5105e8873.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5c9d62d7737cda87b01fa06ae24ff98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933093b52cca887f597cbe22a5467b11.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2016168a68d0ab74a14b16a6b84c25f5.png)
⑤在同一坐标系中函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b161347f6a2fcfd9bf0acf1e8a03fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef9d69de06c1300c314c3c6623abb1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
其中正确命题的序号
您最近一年使用:0次