解题方法
1 . 已知椭圆
的离心率为
,两焦点之间的距离为4.
(1)求椭圆的标准方程;
(2)过椭圆的右顶点作直线交抛物线
于A、B两点,
①求证:OA⊥OB;
②设OA、OB分别与椭圆相交于点D、E,过原点O作直线DE的垂线OM,垂足为M,证明|OM|为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/948261c41cc1509f023761d880c75582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆的标准方程;
(2)过椭圆的右顶点作直线交抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
①求证:OA⊥OB;
②设OA、OB分别与椭圆相交于点D、E,过原点O作直线DE的垂线OM,垂足为M,证明|OM|为定值.
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2020-07-30更新
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2卷引用:甘肃省武威第八中学2019-2020学年第二学期期末考试高二数学(文科)试卷
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2 . (1)求证:
.
(2)已知
,用分析法证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/791586b58c62684f6983a12c14300bdd.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ac12138178cb539a9e1c8f77587038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0bbac8f3e00fd58c206d93a20a3f92.png)
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2020-02-26更新
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382次组卷
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2卷引用:甘肃省天水市甘谷县第一中学2019-2020学年高二上学期期末数学(文)试题
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3 . 证明下列不等式:
(1)用分析法证明:
;
(2)已知
是正实数,且
,求证:
.
(1)用分析法证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c19d94ff48082c1cd213c82c99abf0.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751e274e9107d780c39ba9c49d6daefb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d689b0da0bd4803b3e8a6c69542ae466.png)
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4 . 已知数列
满足
.
(1)证明数列
是等比数列,并求数列
的通项公式;
(2)数列
满足
,
为数列
的前
项和,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e9503b83ec3fa2939923ae5e4d6902.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8da2e317b095db07efdfa8bea95e3b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2c71bf821df60553783704f41cd6c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d8dc623a9bac29298adee9a51208790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9928e46511e601913619a427ded84a3.png)
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2017-11-13更新
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3卷引用:甘肃省兰州市永登县第一中学2020-2021学年高三上学期期末数学(文)试题
5 . 选修4-5:不等式选讲
(1)已知实数
满足
,证明:
;
(2)已知
,求证:
-
≥
+
-2.
(1)已知实数
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572510233698304/1572510240079872/STEM/c42133797e144bd798b01c2bcdec893e.png)
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572510233698304/1572510240079872/STEM/1a31445d95db400eb1b539cf279a670d.png)
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572510233698304/1572510240079872/STEM/f22e36bb2d2441ae98abb36308569e68.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eda48853e8bdb7e266370b4e0d5a258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fccd1ef6cb6e28ae7ddc66b7e7bed1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c70fcaa661df4fbcad820b439accda.png)
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2016-12-04更新
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726次组卷
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2卷引用:2016届甘肃省天水市一中高三上学期期末理科数学试卷
解题方法
6 . 已知
.
(1)求证:
;
(2)若
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e758dc35728ef6f38434737c7c157d6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650e1fbe70fe158d525e096ba2bef858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b0113fd4c7d157757571f9a009e02af.png)
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解题方法
7 . 如图正方形ACDE所在平面与平面ABC垂直,M是CE和AD的交点,且
,
.
(1)求证:
平面EBC;
(2)求锐二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/b1404641-05c8-4b55-bcd1-bc9a16d235fd.png?resizew=140)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
(2)求锐二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a351d71fa01d3f5920e374a8ee7b524.png)
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2023-12-11更新
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225次组卷
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7卷引用:甘肃省白银市会宁县第四中学2015-2016学年高二上学期期末考试数学(理)试题
8 . 已知直线
:
和圆
:
.
(1)判断直线
和圆
的位置关系,并求圆
上任意一点
到直线
的最大距离;
(2)过直线
上的点
作圆
的切线
,切点为
,求证:经过
,
,
三点的圆与圆
的公共弦必过定点,并求出该定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f7fbfa2214ca72495a993b2fed8b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6980c1b60505861f5dda0faaecbd78d8.png)
(1)判断直线
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)过直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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2024-01-12更新
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207次组卷
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2卷引用:甘肃省2023-2024学年高二上学期1月期末学业质量监测数学试题
9 . 已知A、B是椭圆
上两点,且
.(O为坐标原点)
(1)求证:
为定值,并求△AOB面积的最大值与最小值;
(2)过O作OH⊥AB于H,求点H的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc11e7549cfce9220e70250ac943e457.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb8956ebcde7cf0f1011a2fc1888e15.png)
(2)过O作OH⊥AB于H,求点H的轨迹方程.
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10 . 已知数列
的各项均为正数,记
为
的前
项和,若数列
是等差数列,且
,
.
(1)求证:数列
是等差数列;
(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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/832d1e3a06f59a35396aac6e12c5e2ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233ede8e2b7ddd6807e67d974b7370ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8913afb9e7dfbe09d94d555465f3799d.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)
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