1 . 给出下列四个命题:其中所有正确命题的序号为
①中,是成立的充要条件;
②已知锐角
满足
,则
的最大值是
;
③将
的图象绕坐标原点O逆时针旋转角
后第一次与y轴相切,则;
④若函数
为R上的奇函数,则函数的图象一定关于点
成中心对称.
①中,是成立的充要条件;
②已知锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2cb357f48364ac47fd8a92d635c107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821309f088a175c00dc0f4828334503d.png)
③将
![](https://img.xkw.com/dksih/QBM/2015/1/16/1571965939204096/1571965945004032/STEM/b301cdaa80dd49899b5d0865a7e0c237.png)
![](https://img.xkw.com/dksih/QBM/2015/1/16/1571965939204096/1571965945004032/STEM/2df32e6bc7fe486885c4cadbb9122d20.png)
④若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb839865d03d7bb6ee20032d370c2ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b3620056971f56c0740a9e40fea990.png)
A.①②③ | B.②④ | C.①③④ | D.①②④ |
您最近一年使用:0次
名校
2 . 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:江西省宜春市铜鼓中学2020-2021学年高一上学期实验班期末数学(理)试题