解题方法
1 . 已知椭圆
过点
,左焦点为
,过点
的直线
与椭圆
交于
两点,动点
在直线
上,直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3448def59c9f5bb5168a510e74b28e1.png)
的斜率分别为
.
(1)求椭圆
的标准方程;
(2)问是否存在实数
,使得
恒成立,如果存在,请求出
的值,如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea8a480a2fe03293cb8303da8837d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46542271c7fa06f33b222424838c9684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f36374ce95a4945d0e58264c2b271f.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/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3448def59c9f5bb5168a510e74b28e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d567bdeba9b8e17d0911f594e141eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8662be7d259210ad509ceac151d063c6.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)问是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc0e52a5009b8a725ea17fbb31b34bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2 . 已知
是过抛物线
焦点
且互相垂直的两弦,
(1)若直线
的倾斜角为
,求
弦长;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad57e8a1cec2511a0ab55faf7626eda4.png)
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解题方法
3 . 过抛物线
上一点
作两条相互垂直的直线,与E的另外两个交点分别为A,B,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0782718dd8b2e591ef21fc89d1af2fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0fe3f68cbbcc907caab5083d08df301.png)
A.E的准线方程为![]() |
B.过点M与E相切的直线方程为![]() |
C.直线AB过定点![]() |
D.![]() ![]() |
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4 . 已知a,b,c为实数,则下列命题中正确的是( )
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() |
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2024-02-14更新
|
353次组卷
|
2卷引用:广东省深圳市龙岗区2023-2024学年高一上学期1月期末质量监测数学试题
5 . 在棱长为2的正四面体ABCD中,E,F,G分别是棱AB,AD,DC的中点.则下列各式成立的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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6 . 如图,正方体
的棱长为2,O为
的中点,点E在棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/115abe2b-d05e-466d-8191-feeae408bb40.png?resizew=164)
(1)证明:
平面ABCD;
(2)求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80511b9849344e1d0906e3fc42d4b850.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/115abe2b-d05e-466d-8191-feeae408bb40.png?resizew=164)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af142a6050b54e8b5777a085d4597481.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becf2941e15d668d93ea6ed980afd0ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a83c0b8db2205a6815811aa4ff5390f.png)
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解题方法
7 . 已知椭圆
的短轴长
,离心率为
.
(1)求C的标准方程:
(2)过点
的直线与C交于P,Q两点,P关于x轴对称的点为R,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
(1)求C的标准方程:
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2b1f4120365cb6ee4925fe417563f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e151338e3226dc1d410373bb965d9cb7.png)
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8 . 如图,在四棱锥
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/4a7c49f8-0822-4b2f-9461-f745b7c35f69.png?resizew=166)
(1)求证:
平面
;
(2)若
,若平面
与平面
夹角的余弦值为
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d6c78a2396201bc322f30cb9dfed796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/486ab67c26a2e81304932fe858aa5526.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/4a7c49f8-0822-4b2f-9461-f745b7c35f69.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40fbcffdae970048e3ea0ff7472a62b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfaf581b4f42a25087f7eee23a7d66b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5da631296d53a08d56fb5f9bec2376c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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解题方法
9 . 设函数
,对任意给定的
,都存在唯一的
,使得
成立,则a的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9350f336d001fb55b338411361e649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdb306f14d0d13f90a79e985f2bbe773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8194eb338a9493e3a9acf4a62687fbdc.png)
A.![]() | B.1 | C.![]() | D.2 |
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10 . 函数
(其中
)的部分图象如图所示,先把函数
的图象上的各点的横坐标缩短为原来的
(纵坐标不变),把得到的曲线向左平移
个单位长度,再向上平移1个单位,得到函数
的图象.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/941a8786-c454-4139-93e5-ba95c02d0c9f.png?resizew=164)
(1)求函数
图象的对称中心;
(2)当
时,求
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68ae6678d22dc7b9125533b2c873b9e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14fd82a003d2169031a410c5aa7cce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/941a8786-c454-4139-93e5-ba95c02d0c9f.png?resizew=164)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996a018d98a994ceb00b73a6733863bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
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