解题方法
1 . 如图,四棱柱
中,侧棱
底面
,所有棱长都为2,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/b2dd4cec-eb6c-471b-92b5-08f3bc693c66.png?resizew=155)
(1)证明:
平面
.
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/b2dd4cec-eb6c-471b-92b5-08f3bc693c66.png?resizew=155)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554923047631d16320c2ba39abeee99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
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解题方法
2 . 已知
,求
及
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9ea1adc9a61d51e23b1f783a2acf15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80bd1195fed8323a71acde3859c37bc3.png)
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解题方法
3 . 已知
是等差数列,
,数列
的前
项和为
,
.
(1)分别求数列
和
的通项公式;
(2)记数列
的前
项和为
,求
的最小值和最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894aaec56149f880c7cf2bbc0f358d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e613ab2494692285af64088086d513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f1ce1d77a0a00432fccf2a0b3b85dc8.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/49e3a9bb248d5c1580b04a35bf884100.png)
(1)分别求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894aaec56149f880c7cf2bbc0f358d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f1ce1d77a0a00432fccf2a0b3b85dc8.png)
(2)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2767882820f4ba0defde0e412adb747f.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/86f4b551303a9a9a657ab3afbc14006b.png)
您最近一年使用:0次
2020-03-13更新
|
348次组卷
|
2卷引用:2017年7月贵州省普通高中学业水平考试数学试卷
名校
4 . 已知各项均为正数的等比数列
中,
,则
公比![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894aaec56149f880c7cf2bbc0f358d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b87180760dacba44b0441f22686993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894aaec56149f880c7cf2bbc0f358d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
您最近一年使用:0次
2020-03-13更新
|
382次组卷
|
2卷引用:2017年7月贵州省普通高中学业水平考试数学试卷
5 .
中,内角
的对边分别为
.已知
成等比数列,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c53ba20b6e6cfd43641211e0a8dda4.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b850b6c714abe0d117eae47783230b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45be552695f7ca2bdc00cd7d7cef068f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c53ba20b6e6cfd43641211e0a8dda4.png)
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解题方法
6 . 已知直线
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21086ac9cff56aa042a6394f3e18c25d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1095c036b49c3327baaa2c3c7f746134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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7 . 函数
的最小值是_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b629bea8e22de9bfc49158e2289871.png)
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8 . 已知函数
的图像经过点
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bebb3b7f47e0decd48e64cb32aaa5903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e9b5ce6c786be4588150ea33b0a3aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
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9 . 若圆
上有且仅有两个点到直线
的距离等于1,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4ae8e4da05b7500ceb0e707efae6f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/742f980484870d3bf454cba8d46b4981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
10 . 定义在
上的奇函数
,恒有
成立,且在区间
上是减函数,设函数
,若
在区间
上有四个不同的零点
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9249b72db4cb2e92100af8af4a8c72c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bd3e76fc3e166fde0b91f50375fca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441934e9129058eb28c04b1f588d8963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4695c34aafd1c1ae276f9eddc53a397d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ccd22fd0ca1a8e1468329284f91b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade331851befdd556917c4a9de446a38.png)
A.![]() | B.![]() | C.3 | D.6 |
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