已知集合
,集合
,命题
,命题![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf421234303a09fc249145b08971a4d.png)
(1)当实数a为何值时,p是q的充要条件;
(2)若
,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3f3ea5c3d0f430313fc51ad952bd24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57167a64900a258a0effe8077f3671b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fea5ddb4dd883ca6abffd9a6f3e154f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf421234303a09fc249145b08971a4d.png)
(1)当实数a为何值时,p是q的充要条件;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/718b359a7e693a66e2662e15cdb94743.png)
更新时间:2022-10-25 19:56:59
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适中
(0.65)
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解题方法
【推荐1】设集合
,
.
(1)当
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(2)若
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(1)当
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf22d7d1a965bda25168a233fb6290c.png)
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【推荐2】已知集合
,
,
.
(1)求
,
;
(2)定义
,求A-B,B-A.
(3)写出“
”的充要条件(要求有详细的推理过程).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d5067b686e2ed98ae8c0d9059b1b1a0.png)
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a964b99d839b459f7f14af1d512edcf4.png)
(2)定义
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34a6d26a4a917efa7694f63679e6259.png)
(3)写出“
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适中
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解题方法
【推荐1】已知全集
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.
(1)当
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(2)命题
,命题
,若
是
的必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a64dc61989ca50b9ee19d835c4ed268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8b947e527e77d19e96f9ba9f41effd9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
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(2)命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa3ce35f134bf2d3ede948a90653247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4392609f63fcb931c45d779be927a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
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【推荐2】已知关于
的方程
,
求:
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(2)方程至少有一正根的充要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5652b8c1612fee13219d210b4b45a02.png)
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(1)方程有两个不同正根的充要条件;
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【推荐2】已知关于
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(1)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097ca32934ef96f84e79ef007f2d8708.png)
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【推荐3】已知函数
,集合
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(1)当
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,若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b55317a1c20a2cedc82864eadcb2fc34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5de4f8d3d7a41963b43968fe446503e.png)
(1)当
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