已知函数
,其中
.
(I)若对任意
都有
,求
的最小值;
(II)若函数
在区间
上单调递增,求
的取值范围·
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c9096615210e095518bb4b01820d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
(I)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba5b1bea5430d9cd1aa9f661167bc198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
(II)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80fcd5a1ca4f9abf76c88db3a3542b38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2710bba7b9ab4fff6bdd47b8b92d334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
更新时间:2018-12-21 16:28:20
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知函数f(x)=x2+4[sin(θ+
)]x﹣2,θ∈[0,2π].
(Ⅰ)若函数f(x)为偶函数,求tanθ的值;
(Ⅱ)若f(x)在[﹣
,1]上是单调函数,求θ的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdab625e32e38d1c72c901cece0e147.png)
(Ⅰ)若函数f(x)为偶函数,求tanθ的值;
(Ⅱ)若f(x)在[﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】已知函数
.
(1)求函数
在区间
上的最小值;
(2)若
,
,求
的值;
(3)若函数
在区间
上是单调递增函数,求正数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/198c42bee8ddb09070e244789794b7b0.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c9aeed3c8c5a04e48d011c607f9142.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c58d9b477b785d042683ebfbcae2567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12541463c06b4ea2ce8b906536b3479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9ba9745c01bcc7c3b62a4ee6dd60a3a.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e2dc9d156c14f28bbe9cdb09d5d4af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbf600db2a4369738ca996d301d3aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐3】已知
,函数
.
(1)求函数
在区间
上的最大值和最小值;
(2)若
,求
的值;
(3)若函数
在区间
上是单调递增函数,求正数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c10f567e6485d3ea840c876ee70c940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc1525aee9019a25cf71dc6054ec1ce.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c9aeed3c8c5a04e48d011c607f9142.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf85c39be2a5ffb5fb2012d2457494e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ff0e5c78c04beea4e773185195da30.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a5ae86d70dc41b37d8a6707c167b03d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b5f1f1e47ab8a7f7c17965ecbcabfe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知函数
的最大值为
.
(1)求常数a的值;
(2)若函数f(x)在[
,m]上只有两个零点,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9227b1afb01dc8cae8736ddd2889a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(1)求常数a的值;
(2)若函数f(x)在[
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39dbd2197113172b7d591e6381de61c0.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】已知函数
.
(1)若
,求
的最大值及对应的
的取值集合;
(2)若对任意的
,
,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae671ab4cf706c86cae9e3533fb81ba.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33890c6b0bf167514d44139d9dca0154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e141628744869fea2247088e7ffc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次