名校
1 . 代数基本定理:任何一个
次复系数多项式方程
至少有一个复根.由此可得如下推论:
推论一:任何一元
次复系数多项式
在复数集中可以分解为
个一次因式的乘积;
推论二:一元
次多项式方程有
个复数根,最多有
个不同的根.即一元一次方程最多有1个实根,一元二次方程最多有2个实根等.
推论三:若一个
次方程有不少于
个不同的根,则必有各项的系数均为0.
已知
.请利用代数基本定理及其推论解决以下问题:
(1)求
的复根;
(2)若
,使得关于
的方程
至少有四个不同的实根,求
的值;
(3)若
的图像上有四个不同的点
,以此为顶点构成菱形
,设
,
,求代数式
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab009a153dfcc13ba9eb4916c76f8ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b7bff9b2431134f7683a9cc4e68acd.png)
推论一:任何一元
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab009a153dfcc13ba9eb4916c76f8ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
推论二:一元
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
推论三:若一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14c686bfce270ec65d068555d1866ff.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dadabea3f5008d97a32382752e62bdd8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec4e65c4c043edef8084b292675395c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcecb855c13987b207aec2db73c9ec5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc04eee630e386f7be4ac709ff4e16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df74fc4cedb204eb6dcce64b706e99c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed0c942fae0e9dd2d219ad8269511898.png)
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名校
解题方法
2 . 在圆锥PO中,AC为底面直径,
为底面圆O的内接边长为
的正三角形,点E为PC中点,且母线PC与底面圆O夹角为
.
(1)求证:平面
平面
.
(2)求二面角
的平面角的正弦值.
(3)在PO上是否存在点M,使得DM与平面
所成角为
,若存在,请求出所在位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3547a914468b082d8d8741b974a03190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e384e0ffc3d599303b77ee2a12221e.png)
(3)在PO上是否存在点M,使得DM与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
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名校
解题方法
3 . 在
中,内角
所对的边分别为
,已知
,
.
(1)求
.
(2)若
为锐角三角形,求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7af7c5df749c6fa9bbe87faa72c66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f2599ca8b6b683e57a82699c8b1ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/759e6d90078d6d79e68c55e39e118d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2129fc59f4fbcc28ac8ea3df9c550eac.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
名校
解题方法
4 . 在棱长为2的正方体
中,E,F,M,N分别为
,
,
,
中点.
(1)求证:
平面
;
(2)求直线
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e619f087b6b7ab764362b8b64b220cd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc65c549059934e69355d8ecc245da57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f257d6a77d394ddca1f825559aadd5be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3225b8916372c7e0e4d7b71b26571e8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/17/8ea83e69-f4b4-44da-a585-6110ad87a320.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073a88b42836fb88433679932b48ad03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72bdc4f7de61cf83503ccb8a81b36c47.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b686178c52fdf7ac270e75c0795417.png)
您最近一年使用:0次
名校
解题方法
5 . 在△ABC中,
.
(1)求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575212f03d6cd6a84ddcf1c4c955324e.png)
(2)若M为BC上一点,
求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/485688133c06eae9cb558df2f30f8c2a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575212f03d6cd6a84ddcf1c4c955324e.png)
(2)若M为BC上一点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1649b4453e7a76485b8287e0f9bc5072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e8ecb371ce77dca5554e8e03b41386.png)
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名校
解题方法
6 . 如图,在三棱锥
中,
分别是棱
的中点,
,
.
平面
;
(2)求证:
平面
;
(3)求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c104d1aa4dcec822910d29dd18a8137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa7eeef77943d9a8f913ddf27604328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6559aabe16c2318687089e7cc498b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65d5853c26657db448af610ac72cca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b766876252d16f2e331ef2893d45cf04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(3)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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名校
解题方法
7 . 在
,
为
边上的中线,点
在
边上,设
.
(1)当
时,求
的值;
(2)若
为
的角平分线,且点
在
边上,求
的值;
(3)在(2)的条件下,若
,求
最小值?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f744e91051bc298c82461a1b8efbc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a775cd2e88d786d495ae2cb262a2b0f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925a74e86290434186f10526e55bd36f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f4f8e27f307a8a998a3335ba7d1bb4.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a655b029decf667584b587052f7b9b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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名校
8 . 设,我们常用
来表示不超过
最大整数.如:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d959974d562cb9ef138676ae943bc19c.png)
(2)在锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c9bcb51024df4a7d1a04e46ca12549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6f4e9bb8b453665bfe9b8fa24711cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26a1633c3dde29b96636a2300ab074f5.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48da06492a0b0c8a31a5dc1531e8f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb945c963b0d56df9d784d3e3288c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a9d89ec3d1181091ea159b40952b65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2024高一下·江苏·专题练习
名校
解题方法
9 . 已知
的内角
所对的边分别为
,向量
与
平行.
(1)求
;
(2)若
,求
的面积.
![](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/8f0a69426b756086f177b734275974f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0de8400366e603b83568a0e8a5af9af.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f9314433f619d6dad2b43f78d39506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2024-04-15更新
|
2295次组卷
|
16卷引用:重庆市荣昌中学校2023-2024学年高一下学期第二次教学检测(5月)数学试题
重庆市荣昌中学校2023-2024学年高一下学期第二次教学检测(5月)数学试题(已下线)第十一章 解三角形(压轴题专练)-单元速记·巧练(苏教版2019必修第二册)浙江省杭州市富阳区场口中学2023-2024学年高一下学期3月教学质量检测数学试题广东省茂名市高州中学2023-2024学年高二下学期3月滚动测试数学试题贵州省遵义市桐梓县荣兴高级中学2023-2024学年高二下学期第一次(3月)月考数学试题天津市嘉诚中学2023-2024学年高一下学期第一次月考数学试卷广东省东莞市东莞中学松山湖学校2023-2024学年高一下学期第一次段考数学试题吉林省长春市实验中学2023-2024学年高一下学期第一学程(4月)考试数学试题福建省福州外国语学校2023-2024学年高一下学期期中考试数学试卷广东省中山市中山纪念中学2023-2024学年高一下学期第一次阶段考试数学试题广东省梅州市梅县区丙村中学2023-2024学年高一下学期3月月考数学试卷(已下线)专题20 三角函数及解三角形解答题(文科)-1(已下线)专题20 三角函数及解三角形解答题(理科)-1河南省信阳高级中学2023-2024学年高一下学期5月期中考试数学试题(已下线)专题03 解三角形问题总结-《期末真题分类汇编》(江苏专用)湖南省长沙市南雅中学2023-2024学年高二下学期第二次月考(5月)数学试题
名校
解题方法
10 . 已知
是平面内任意两个非零不共线向量,过平面内任一点
作
,
,以
为原点,分别以射线
为
轴的正半轴,建立平面坐标系,如左图.我们把这个由基底
确定的坐标系
称为基底
坐标系
.当向量
不垂直时,坐标系
就是平面斜坐标系,简记为
.对平面内任一点
,连结
,由平面向量基本定理可知,存在唯一实数对
,使得
,则称实数对
为点
在斜坐标系
中的坐标.
(长度单位为米,如右图),且
,设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685535354ea99d84fd8e59e5bb509483.png)
(1)计算
的大小;
(2)质点甲在
上距
点4米的点
处,质点乙在
上距
点1米的点
处,现在甲沿
的方向,乙沿
的方向同时以3米/小时的速度移动.
①若过2小时后质点甲到达
点,质点乙到达
点,请用
,表示
;
②若
时刻,质点甲到达
点,质点乙到达
点,求两质点何时相距最短,并求出最短距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a076848a8ffbd0760fcdfd36b8ae8437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8114aa9f42de32336bfab841980d8a24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4181d61c3ce87141eeb3433c872529a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc7553e6eb48e82ed03fab82d9d3f591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e647c14561826ba9e396acc5a3792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4833bdfaf0e3c186c3748699aaedee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59fc0767aa413e427b60d09c84e3615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4833bdfaf0e3c186c3748699aaedee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9851846d24701bf7ab3b35fce7676d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4647b85ebbbc8889720c6ff3c929cd66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecbed7a9a503f5897311840eec49e940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4647b85ebbbc8889720c6ff3c929cd66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a314ab1aa622c7962cdfdee02410203e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53147d334931501aa2a1140e00ceeca3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62eeab1830414dbbff26e27c6c78436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685535354ea99d84fd8e59e5bb509483.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b14123852c3e17f0a519282e076797.png)
(2)质点甲在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14069d21d32c724f0ebe3e311f114c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167f121a878699fa60e6cb467bf10484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320319d8230188d5fd7e7c7f4a540ae1.png)
①若过2小时后质点甲到达
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af62a51e61a58e7fb5ff757d34695ca3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc1070a28cb9cb8553c29747d1993b16.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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2024-04-07更新
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