名校
1 . 如图,四棱锥
的底面是正方形,平面
平面
,
,E为BC的中点.
(1)证明:
;
(2)若
为锐角三角形,求直线AE与平面PAD所成角的余弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4d19bf237a6fca67e0d01a9ddb726.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/e2a3105d-f623-4ef6-8c50-ad1071af465d.png?resizew=158)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304e9d63e7fdc531f4f7b805b765a1b1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2cc5f8cec8c498aa12c99c04e1c97d.png)
您最近一年使用:0次
2 . 已知等差数列
的前
项和为
,且
.
(1)求数列
的通项公式;
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd9f0dcd2ca0523cba5c0b4e037613f4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea83fc1bcb18a88bd7f59f91a6ad123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2024-02-27更新
|
531次组卷
|
2卷引用:重庆市铜梁中学校2023-2024学年高二下学期开学考试数学试题
名校
解题方法
3 . 已知整数
,集合
,对于
中的任意两个元素
,
,定义A与B之间的距离为
.若
且
,则称是
是
中的一个等距序列.
(1)若
,判断
是否是
中的一个等距序列?
(2)设A,B,C是
中的等距序列,求证:
为偶数;
(3)设
是
中的等距序列,且
,
,
.求m的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ceeff24d888e358d2261dc5297b4ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f542b813cc3bed485d23760a4ecbec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d0f3799612b81e85b87241ec8eee68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53422543e9a9311416faf749bdda67b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca35f4615ee3791b732587e958f8033f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ab4a9bfa50054c808dd8190305d0abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9639ce2dc706bba6ef6b773e25fe15a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d05111e65219f66ecee0710dd5c163.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e57fcd5fb8f222b56f449662144b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d0f3799612b81e85b87241ec8eee68.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1cceb7b65ea109ee8ab8af8c039271.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6069b744fec0d7e00a7869ef8407c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad5b0dc4aad791035b5c4ab87bd4702.png)
(2)设A,B,C是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1bbb0a939ec3c2d0414c2351f93ae5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/033bbaf9efac3563ae3ac2cd3d7c6738.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e57fcd5fb8f222b56f449662144b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e754717bc7c470f9e21fa4fe17808ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f8b0161a8f09f832d9d49a781ee51c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/848aeab240f0f386f3fbe1ee1d8affc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff099d9d2d0a4a0c50339ff01e16010.png)
您最近一年使用:0次
2023-01-04更新
|
1443次组卷
|
6卷引用:重庆市铜梁中学校2023-2024学年高二下学期开学考试数学试题
重庆市铜梁中学校2023-2024学年高二下学期开学考试数学试题北京市清华大学附属中学2022-2023学年高一(非马班)上学期数学期末试题北京市第五中学2023-2024学年高一上学期11月月考数学试卷(已下线)专题1 集合新定义题(九省联考第19题模式)练(已下线)微考点8-1 新高考新题型19题新定义题型精选重庆市缙云教育联盟2024届高三下学期第二次诊断性检测数学试题
名校
4 . 设椭圆
,圆
,点
,分别为E的左右焦点,点C为圆心,O为原点,线段
的垂直平分线为l.已知E的离心率为
,点
关于直线l的对称点都在圆C上.
(1)求椭圆E的方程;
(2)设直线l与椭圆E相交于A,B两点,问:是否存在实数m,使直线
与
的斜率之和为
?若存在,求实数m的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6674900a501670f239242262595adc40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
(1)求椭圆E的方程;
(2)设直线l与椭圆E相交于A,B两点,问:是否存在实数m,使直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
您最近一年使用:0次
2021-12-28更新
|
1404次组卷
|
4卷引用:重庆市铜梁中学校2023-2024学年高二下学期开学考试数学试题
名校
5 . 已知函数
(
为自然对数的底数)
(1)若
在点
处的切线方程为3x+y+7=0,求a的值;
(2)讨论
的单调性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0b2899dcadd4bfb5e78b5460aa6531c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0900642509853376f5100dfe6baff871.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
(2)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
您最近一年使用:0次
2021-05-30更新
|
517次组卷
|
2卷引用:重庆市铜梁中学校2023-2024学年高二下学期开学考试数学试题