解关于x的不等式组:
,其中a为参数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0708dcb2d045ad971e879637b110945.png)
更新时间:2018-03-05 14:50:14
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【知识点】 由不等式组解集的情况求参数解读
相似题推荐
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】对
,
定义一种新运算
,规定:
(其中
均为非零常数),这里等式右边是通常的四则运算,例如:
.
(1)已知
(1,1)=4,
(4,-2)=7.
①求
的值;
②若关于
的不等式组
恰好有4个整数解,求实数
的取值范围;
(2)若
对任意实数
都成立(这里
和
均有意义),则
应满足怎样的关系式?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcccb68e35b63cc81d324c6e5e4f05d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c27bb4af66157f9cb881393c56b305e.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
②若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08baf7b8c5cd043d5a0a6c5f3802f6b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78e76c354b640e0642b00abbd41edac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e647c14561826ba9e396acc5a3792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4c05579e38b05dfb9322e2b74827ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02bebf73d6203d8b88198cfe9fb54906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
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解答题-问答题
|
较难
(0.4)
【推荐2】如图,数轴上两点A、B对应的数分别是
,1,点P是线段
上一动点,给出如下定义:如果在数轴上存在动点Q,满足
,那么我们把这样的点Q表示的数称为连动数,特别地,当点Q表示的数是整数时我们称为连动整数.
,0,2,3.5四个数中,连动数有______;
(2)若k使得方程组
中的x,y均为连动数,求k所有可能的取值;
(3)若关于x的不等式组
的解集中恰好有3个连动整数 ,求这3个连动整数的值及a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d14c6959273338a048b023805cce80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89117f3793e604ce6793f258369051b.png)
(2)若k使得方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e1fb300c7ce4706f2d5bc66ca32a31.png)
(3)若关于x的不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be14e099b5e9d8b00b2d20585d1d20b.png)
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