1 . 如图,抛物线
与x轴交于A,B两点,把该抛物线在x轴及其上方的部分记作
,将
向右平移得到
,
与x轴交于B,D两点,如果直线
与
,
共有3个不同交点,则k的最大值是
![](https://img.xkw.com/dksih/QBM/2020/3/9/2415766425976832/2418684933521408/STEM/9154580fefff4c4c9a26665376f3053c.png?resizew=222)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d162d4eca2ba9e34ec54ed5a2566c474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9c27791cf317a48003cd375da3a2cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://img.xkw.com/dksih/QBM/2020/3/9/2415766425976832/2418684933521408/STEM/9154580fefff4c4c9a26665376f3053c.png?resizew=222)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知函数
,其中
,
.
(1)当
时,解不等式
;
(2)若函数
在区间
内恰有一个零点,求
的取值范围;
(3)设
,当函数
的定义域为
时,值域为
,求a,b的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a018b59cd94b75701065304e404657c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558e5164dd5bc085d892cd82072fa8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d285a4c557fc9748105b62ccd94b7859.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7191920c92a5a62f88e4a58db9f6f038.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f9f734c03d04c21edefa08e0acc1fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f2416d1f75a45a314331146550832e.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731bdc8d2686a05f12a2ba8a7e3b01be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9853fea0660ba76333e3c7d33344ae67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2518dbe3f9e83ced97e4dd1f6e008f30.png)
您最近一年使用:0次