已知二次函数
.
(1)若“
”为真命题,求实数
的取值范围;
(2)是否存在小于4的整数
,使得关于
的不等式
的解集恰好为
?若存在,求出所有可能的
的取值集合;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f75e7f6a10c069e07ad4afba0765f46.png)
(1)若“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b18f9a0d2ac64b1b9559b9223d834e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)是否存在小于4的整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c22889383948465b85160f0b0b6e6cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9bbac5b17a7c357de982a89787c011e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2020-10-19 13:08:45
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知
,设
:指数函数
在
上为减函数,
:不等式
的解集为
.若
和
有且仅有一个正确,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8558bc08adb014aadc8439b5a5ef6a1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/232124cc50f5b7ba8fc1594bd98544cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5620f6cebffd6d57c75fd180ee932d79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.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/071a7e733d466949ac935b4b8ee8d183.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】已知关于x的不等式ax2+bx+c>0的解集为{x|2<x<3},求关于x的不等式cx2+bx+a<0的解集.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知
,函数
.
(1)当
时,解不等式
;
(2)若关于
的不等式
在区间
上有解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94c88541598065e5195404169492f6f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d3c756a52c9185ae6d02d9b9312f29.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d3c756a52c9185ae6d02d9b9312f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ce20dd544425c8bd3f2a885eca7bc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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】已知幂函数
为偶函数,且在区间
内是单调递增函数.
(1)求函数
的解析式;
(2)设函数
,若存在
使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee53adfd227b294929b2979c4f8c260b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c22fe27e30ca1a72b21a8af7bea76bcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27d959225edd7e507a56d1007bcb21cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36f7ab55b63c08280a41fb64366b819.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次