解题方法
1 . 如图,在三棱锥
中,
是边长为2的等边三角形,且平面
平面
.
体积的最大值;
(2)若
,点E为线段
上一点,当二面角
为
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f910a9be78a6580195c0c51d6259a5c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d3866a226333dbb75754ec9ab916fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324d453870b345da0c41977290192f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a50b31b40c0d28bed4572ce27b30a19.png)
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2 . 在
中,内角A,B,C的对边分别为a,b,c,点D为边
上一点,且满足
.
(1)证明:
;
(2)若
为内角A的平分线,且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbb66c477a0b0ab67e5759b72c3c802.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c52b857c7ca55dfa6da108df1d3cee2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e828b8edf7a8f2cdcfceb13a4e05bf6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
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3 . 已知函数
.
(1)讨论函数
的单调性;
(2)当
时,若函数
,求函数
极值点的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352c81d53b70448066d371fd70474ef1.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce6c68549ee638282e61171be993a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
您最近一年使用:0次
2024-06-04更新
|
1213次组卷
|
2卷引用:河北省石家庄市2024届高三教学质量检测(三)数学试卷
名校
解题方法
4 . 如图,已知菱形
和菱形
的边长均为2,
,
,
分别为
、
上的动点,且
.
平面
;
(2)当
的长最小时,求平面
与平面
的夹角余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31285c747ac70d3ea0beac9b658d027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793e03b60fc5ac445d6d44c508e7e73e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b138770c405307ea4fc828624645e2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6541c0cb89f08aa4c937c0beb915e0a7.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82cb18c10820d927ecd53326f58aaf8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881129039cb98be128af55ffa1d3b7dc.png)
您最近一年使用:0次
2024-06-04更新
|
471次组卷
|
2卷引用:河北省邯郸市2024届高三下学期高考保温数学试题
名校
5 . 如图,在四棱锥
中,四边形
为正方形,
平面
,且
.E,F分别是PA,PD的中点,平面
与PB,PC分别交于M,N两点.
;
(2)若平面
平面
,求平面
与平面
所成锐二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f4248e8021130ab60365e3d2e9a694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d685b2138e6499686474bb2d131a2234.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6330fd7da754a65cc0328dfdba3169f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f4248e8021130ab60365e3d2e9a694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
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6 . 已知函数
,
为
的极值点.
(1)求a;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20bc7f7a24e5a4c7151627d8eb2ad4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(1)求a;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e36ea2517f31e527310c6890a61f73b5.png)
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7 . 已知函数
.
(1)当
时,求函数
在
处的切线方程;
(2)若
为增函数,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d05faec455cea37e004e18cfb7e290.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
8 . 某地要从2名男运动员、4名女运动员中随机选派3人外出比赛.
(1)若选派的3人中恰有1名男运动员和2名女运动员,则共有多少种选派方法?
(2)设选派的3人中男运动员人数为X,求X的分布列.
(1)若选派的3人中恰有1名男运动员和2名女运动员,则共有多少种选派方法?
(2)设选派的3人中男运动员人数为X,求X的分布列.
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9 . 引起分类讨论的主要原因有:①由数学概念引起的分类讨论;②由数学运算引起的分类讨论;③由性质、定理、公式的限制引起的分类讨论;④由图形的不确定性引起的分类讨论;⑤由参数的变化引起的分类讨论.含有参数的问题,由于参数的取值不同会导致所得结果不同,而对参数按什么标准进行分类是我们的难点,也是我们要重点掌握的问题.已知函数
,规范讨论函数
的单调性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ba8d22604170d22c81e765c91a0982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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解题方法
10 . 已知函数
.
(1)求
的解析式;
(2)判断
在
上的单调性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7683c8c7ff1eeb4a337e5ff51f058d09.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96977a5415357a1b31b00b91b511f884.png)
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