1 . 给出下面命题:①函数
是奇函数;
②存在实数
,使得
;
③若
、
是第一象限角且
,则
;
④
是函数
的一条对称轴;
⑤
在区间
上的最小值是
,最大值是
,其中正确命题的序号是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b68630e5a3d2a59eea99fb1e648542e.png)
②存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0250b8de2011e51fe16a0e33935d5c.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90df641ab645927ee577e79faf18dcdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/890105f677da9bf3d5483f5344065b35.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e60b49815c5c25b48e6c74d7077851a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af4147edfaa16c79f0710fcbf57f480.png)
⑤
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/361961d384e77423bd96ce130b0a4523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a99fc70d2af7e8940c4d9b7e010fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
您最近一年使用:0次
2019-01-30更新
|
405次组卷
|
2卷引用:2013-2014学年湖北武汉蔡甸区第二中学高一下六科竞赛理科数学试卷
解题方法
2 . 已知函数f(x)=
sin2x+2cos2x+m在区间
上的最大值为3,则
(1)m=__________ ;
(2)当f(x)在[a,b]上至少含20个零点时,b-a的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0b1b34a0cb69bd9e0a4622b6352968.png)
(1)m=
(2)当f(x)在[a,b]上至少含20个零点时,b-a的最小值为
您最近一年使用:0次
解题方法
3 . 已知函数f(x)=
sin2x+2cos2x+m在区间[0,
]上的最大值为3,则
(1)m=_______ ;
(2)对任意
,f(x)在[a,a+20π]上的零点个数为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49f8a63ddbca52039fa9ab44cda6b29.png)
(1)m=
(2)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
您最近一年使用:0次