(1)已知函数
(![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
R),当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
时,求函数
的最小值;
(2)解关于
的不等式
(![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
R).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c1270a62c9dc6be66072e5fd4c19f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8faeee24b11ba19e257c12b8fd6b837e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0146843d6435bbd99e4f7ad8d09dd7ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
更新时间:2021-11-26 20:31:23
|
相似题推荐
解答题-问答题
|
较易
(0.85)
名校
【推荐1】经市场调研,某超市一种玩具在过去一个月(按30天)的销售量(件)与价格(元)均为时间
(天)的函数,且销售量近似满足
,价格近似满足
.
(1)试写出该种玩具的日销售额
与时间
(
,
)的函数关系式;
(2)求该种玩具的日销售额
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1051a355623d87138515127f4c357a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8758f87b77b6c471fa24e4435dce1d7e.png)
(1)试写出该种玩具的日销售额
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4227974c61a1543ff87f2e1555e9f1cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca06304795e9c2c1fd0b4a52eb8d5b9.png)
(2)求该种玩具的日销售额
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐2】已知p:∀x∈R,x2+2x≥a,q:x2﹣4x+3≤0,r:(x﹣m)[x﹣(m+1)]≤0.
(1)若命题p的否定是假命题,求实数a的取值范围;
(2)若q是r的必要条件,求实数m的取值范围.
(1)若命题p的否定是假命题,求实数a的取值范围;
(2)若q是r的必要条件,求实数m的取值范围.
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】已知
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a98366db6e2712d4ce95e4cd8c65ba.png)
![](https://img.xkw.com/dksih/QBM/2018/12/7/2091540524154880/2093829085388800/STEM/f78e4f0a9262404a9f559efd2b737e44.png?resizew=211)
当
时,在所绘出的坐标系内作函数
的图象,并写出函数
的增区间;
解关于x的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec5bce37c9f6932972a7dd3d084a3f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a98366db6e2712d4ce95e4cd8c65ba.png)
![](https://img.xkw.com/dksih/QBM/2018/12/7/2091540524154880/2093829085388800/STEM/f78e4f0a9262404a9f559efd2b737e44.png?resizew=211)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8551f11a5e39be9c4ad9e7e8fcdb27e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f06d9130996aeeba4aef05bed21aef90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f06d9130996aeeba4aef05bed21aef90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ca971590eccabc17551465bbaf24a1.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐2】已知命题
(其中
).
(1)若
,命题“
或
”为假,求实数
的取值范围;
(2)已知
是
的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed809bb50ef2c1b5908708079c33890.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://img.xkw.com/dksih/QBM/2018/7/12/1986742545219584/1987648888676352/STEM/ef6f822167bd4272b5bfcd44c01ee352.png?resizew=13)
您最近一年使用:0次