名校
1 . 设集合
,称坐标
在平面直角坐标系中对应的点P为A中元素a的格点.
(1)证明:若
则
.
(2)A中的元素
所对应的格点记作
(
),现将A中所有元素进行排序,使得
,在平面直角坐标系中,求以
为顶点的三角形面积.
(3)已知集合
,若
至少有2个元素,最多有5个元素,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799adb7e4c8ebf9a30182e46e56f3192.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
(1)证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91cc05fe570763e4af0ff4672e2d09e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae4202aa738ce97198687198555c84c.png)
(2)A中的元素
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf99487d7860d017c0747ff966edfd77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019123b8c298384939e99ef5e37720d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8c195da3f1e6e13cc9fc7aca43e17d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4a0c3c4114915039e38b671bb707c09.png)
(3)已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63728e5600559674a6bb03a0f183007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2023-10-07更新
|
197次组卷
|
2卷引用:江苏省连云港市灌南高级中学2023-2024学年高一上学期第一次月考数学试题
2 . 已知
是满足下列条件的集合:①
;②若
,则
;③若
且
,则
.
(1)判断
是否正确,说明理由;
(2)证明:若
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f17b77451caf220bd4808446c5c79e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9661053f3ef4cfa926e5d5fd5c6555f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c443466385f21cd3f06e2e4229add79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acfc595518cf752e1c7903dfff93dbda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f0e9c04402a0ffdaa25c3e3c82c7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ac8248bb70f9ef5b0cb7d025e05160.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de68508dc0a95fc4b5de772390260db.png)
(2)证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9661053f3ef4cfa926e5d5fd5c6555f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f06a4a9deb51418c20e7e7376cc807.png)
您最近一年使用:0次