解题方法
1 . 如图,在三棱锥
中,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/d998eb7a-11df-4d13-b0df-2154f602b580.png?resizew=148)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680bd341c5bc48c24b0d520f66de6512.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/d998eb7a-11df-4d13-b0df-2154f602b580.png?resizew=148)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
您最近一年使用:0次
解题方法
2 . 设等差数列
的前
项和为
,已知
.
(1)求
的通项公式;
(2)设
,数列
的前
项和为
,若
,求正整数
的最大值.
![](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/07fa763fa93060e8cb6c31b022d930ef.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e56d048f53a00eb3d77f01c576afa6.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2147fd48a105ffeccc2bafc78ab93499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
3 . 在数列
中,已知
.
(1)证明数列
是等比数列,并求
的通项公式;
(2)设
,若数列
与
的公共项为
,记
由小到大构成数列
,求
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad97f95de9ea454a79f73e7b1657f25c.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d363b6982fee3bf1337d1542137a2f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ff259bff098430a6512d0e4f6fb2d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64696f60c533ad95dc7890eb902741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
名校
解题方法
4 . 已知圆
过点
和
,且圆心
在直线
上.
(1)求圆
的标准方程;
(2)经过点
的直线
与圆
相切,求
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5272ef0c7dc3d9574334fe68ecbaf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be8fb59da24f78d282c87ed75d033dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0985b973395bcd371cd1e26d3fcd1c36.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9f1c6beba1c6584f0ffd6bfb812b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2024-01-26更新
|
318次组卷
|
5卷引用:河南省新乡市2023-2024学年高二上学期1月期末测试数学试题
解题方法
5 . 如图,三棱锥
中,
,
为等边三角形,
为
上的一个动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/f1a7675a-51e2-410c-b08d-2cd007ce11df.png?resizew=145)
(1)证明:平面
平面
;
(2)当
时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d1dcf629b8e79431420348ab9af345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/f1a7675a-51e2-410c-b08d-2cd007ce11df.png?resizew=145)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c793e088af57bb0ff89012f940f2a29f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f96627abd793ca157d4dd1587f584d.png)
您最近一年使用:0次
2024-01-26更新
|
221次组卷
|
3卷引用:河南省新乡市2023-2024学年高二上学期1月期末测试数学试题
名校
6 . 已知椭圆
与双曲线
的焦距之比为
.
(1)求椭圆
和双曲线
的离心率;
(2)设双曲线
的右焦点为F,过F作
轴交双曲线
于点P(P在第一象限),A,B分别为椭圆
的左、右顶点,
与椭圆
交于另一点Q,O为坐标原点,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd486b8796b3454eab219c28ed131683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e8ecb41c1e7e0cea771f75ccf1b6de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)设双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb7c47e3b286437d8e6ee8b7ec4f003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932b5ed149ea885cfd5353ff2e6ceac2.png)
您最近一年使用:0次
2024-01-25更新
|
957次组卷
|
8卷引用:河南省新乡市2023-2024学年高二上学期1月期末测试数学试题
名校
7 . 设
,
,
,函数
,
.
(1)讨论函数
的单调性;
(2)若
时,函数
有三个零点
,
,
,其中
,试比较
与
的大小关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5331eda67df4c98b3e0dc31a46d381ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a64103561364ac4c9460a72c9e154bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ded5b08362289af5696ca4cd1a6f36d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f291d4a407115b7a83c2621489f5df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0a92b7176bb67c18ca5f043eba98b5.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce4cea6c8b740796100f76320ae9806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10db649c154fc538026c0779325b91f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd39b02127b0b5085c2dcc7205f5a21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f0f405ce844313744d1ccfd222c3dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec733ccf28e47e673cb7d4a73be08a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b546dfbc651d94c624d57b25bcee6331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e20d46ff63add7948a6a26c7baa9ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
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2024-01-12更新
|
423次组卷
|
10卷引用:河南省新乡市2022-2023学年高二下学期期末数学试题
解题方法
8 . 如图,在正三棱柱
中,
是
的中点,
.
(1)证明:
.
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4639a9dc0bc99101cbde59fef04b4a2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/f70e0ef7-cf92-4def-9124-bd624f4dbd6d.png?resizew=158)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a8670759c61d785b9a336885df700b.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53dd937a69497a6743a3119fbce8f07a.png)
您最近一年使用:0次
2023-11-09更新
|
316次组卷
|
5卷引用:河南省新乡市2023-2024学年高二上学期期中数学试题
名校
解题方法
9 . 已知圆
经过
三点.
(1)求圆
的一般方程;
(2)过点
的直线
与圆
交于
两点,
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/505f01ec8ee5ccb89c079d1d3415b575.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/328aaba77106396d4ca644c8b7a352e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108b70590e2be616e7748c65767941a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2023-11-09更新
|
805次组卷
|
8卷引用:河南省新乡市2023-2024学年高二上学期期中数学试题
解题方法
10 . 已知椭圆
的右焦点为
,短轴长为2.
(1)求
的方程.
(2)若
为
上的两个动点,
两点的纵坐标的乘积大于
,且
.证明:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c7b07ace87ed58fdc1f1bc78a04aeda.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8aade8ee1e2e568e1bfd7bdcdf9060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4f96905656ca8f1849ab44f804e5ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2023-11-09更新
|
1110次组卷
|
3卷引用:河南省新乡市2023-2024学年高二上学期期中数学试题