名校
解题方法
1 . 现定义“
维形态复数
”:
,其中
为虚数单位,
,
.
(1)当
时,证明:“2维形态复数”与“1维形态复数”之间存在平方关系;
(2)若“2维形态复数”与“3维形态复数”相等,求
的值;
(3)若正整数
,
,满足
,
,证明:存在有理数
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9dc4e868a310c371ff88075d8a966a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef9d830212489b316bb052455098108e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc8299790d98621b87e73212a2ebb91.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905dd10639c9fef5ef8d66a124756140.png)
(2)若“2维形态复数”与“3维形态复数”相等,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c136aaf9b5dedec254a92ce302f4a70c.png)
(3)若正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94742ebbb028c50d7a58e3e8f4ab329c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35490c12e57ecd91af9934cb17b5c927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed110fbfeb14003270a1039ba174d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f02f2606180ffeda602ff9ae747af6f.png)
您最近一年使用:0次
2024-05-11更新
|
753次组卷
|
4卷引用:广西南宁市第二中学2023-2024学年高一下学期5月月考数学试卷
名校
解题方法
2 . 在
中,内角
,
,
的对边分别为
,
,
,
.
(1)若
,证明:
;
(2)若
,求
周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e899c486dc49e560fc4aca05e16835b7.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe29c42302504e7fd8577dbc7d130ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5fa7ae9c8b4b3c7d57315ac806bd2e8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2024-03-07更新
|
2372次组卷
|
9卷引用:广西南宁市第三十三中学2023-2024学年高一下学期3月月考数学试卷
广西南宁市第三十三中学2023-2024学年高一下学期3月月考数学试卷广西防城港高级中学2023-2024学年高一下学期4月月考数学试题广东省南粤名校联考2024届高三2月普通高中学科综合素养评价数学试题河北省廊坊市文安县第一中学2023-2024学年高一下学期第一次集中练(3月月考)数学试题陕西省咸阳市武功县普集高级中学2023-2024学年高一下学期第1次月考数学试题山东省枣庄市滕州市第一中学2023-2024学年高一下学期3月单元过关考试(月考)数学试卷上海市奉贤中学2023-2024学年高一下学期3月月考数学试卷甘肃省兰州第一中学2023-2024学年高一下学期3月月考数学试题黑龙江省哈尔滨市第二十四中学校2023-2024学年高一下学期4月月考数学试题
名校
解题方法
3 . 在锐角
中,内角A,B,C的对边分别为a,b,c,且
.
(1)求证:
;
(2)若
的角平分线交BC于
,且
,求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b5055aae010483ece488d9e9ac47cae.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2264c134952d41fb9bcb90e6c72c83.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
您最近一年使用:0次
2023-03-24更新
|
8622次组卷
|
13卷引用:广西壮族自治区贵港市平南县平南县中学2024届高三上学期9月月考数学试题
广西壮族自治区贵港市平南县平南县中学2024届高三上学期9月月考数学试题山东省枣庄市滕州市第二中学2022-2023学年高一下学期6月月考数学试题广东省深圳市南山实验教育集团华侨城高级中学2024届高三上学期10月月考数学试题河南省商丘市虞城县第一高级中学2024届高三上学期第三次月考数学试题山东省烟台市2023届高三一模数学试题山东省德州市2023届高考一模数学试题专题10解三角形(已下线)押新高考第17题 解三角形广东省汕头市2023届高三三模数学试题上海市宝安中学2022-2023学年高一下学期期中数学试题贵州省黔西南州兴义市第六中学2022-2023学年高二下学期期中检测数学试题“七省联考”2024届高三考前猜想数学试题江苏省连云港市灌云高级中学2024届高三上学期期末数学试题
名校
4 . 如图,在四面体
中,
,
分别是线段
,
上的点且
,
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/70aa87cb-07fe-4f4f-acf9-7c42596e488f.png?resizew=161)
(1)证明:
平面
;
(2)在线段
上是否存在点
,使得
与平面
所成角的正弦值为
?若存在,求
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1dc432f4cc96c656fc72b191fcc0d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c74d6bbb593ac43cb5320f0e38ad26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02b6d19fedaf8488f9637cd64efbca83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55dbc1e5ecdc9654113807695b14ea1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ad919a6c21e599494997a6d0428b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/70aa87cb-07fe-4f4f-acf9-7c42596e488f.png?resizew=161)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0b72906641ed13716cfbce50923282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6261790c66cc71ee3898afabad0c09f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7007bbab668d985a9313d9df989475a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3829aee2b469a14da422ebe555e16117.png)
您最近一年使用:0次
名校
5 . 求证:在△
中,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9edbd36ddf949dcb97164f4d1879e217.png)
您最近一年使用:0次
2023-04-11更新
|
377次组卷
|
2卷引用:广西壮族自治区钦州市浦北县浦北中学2023-2024学年高一下学期3月月考数学试题
6 . 我国汉代数学家赵爽为了证明勾股定理,创造了一幅“勾股圆方图”,后人称其为“赵爽弦图”,类比赵爽弦图,用3个全等的小三角形拼成了如图所示的等边
,若
,则AC=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5268cbae6d1747a16bdf3302c597c4a.png)
A.8 | B.7 | C.6 | D.5 |
您最近一年使用:0次
2023-04-15更新
|
971次组卷
|
8卷引用:广西南宁市第二中学2023-2024学年高一下学期5月月考数学试卷
名校
7 . △ABC中,a,b,c分别是角A,B,C的对边,
,
,
(1)求b的最大值;
(2)若△ABC的面积为
,求证:△ABC是直角三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e899c486dc49e560fc4aca05e16835b7.png)
(1)求b的最大值;
(2)若△ABC的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
您最近一年使用:0次
2023-03-22更新
|
216次组卷
|
2卷引用:广西柳州市第三中学2023-2024学年高一下学期3月月考数学试卷
21-22高一下·江苏南通·期中
名校
解题方法
8 . 如图,在正方体
中,
分别为
,AB中点.
![](https://img.xkw.com/dksih/QBM/2022/5/16/2980610696609792/2981280855351296/STEM/371f4d35-b257-4fdc-826f-d08e32ba8779.png?resizew=187)
(1)求证:
平面
;
(2)求异面直线EF与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://img.xkw.com/dksih/QBM/2022/5/16/2980610696609792/2981280855351296/STEM/371f4d35-b257-4fdc-826f-d08e32ba8779.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)求异面直线EF与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
您最近一年使用:0次
2022-05-17更新
|
1780次组卷
|
4卷引用:广西玉林市博白县中学2022-2023学年高一下学期4月联考数学试题
广西玉林市博白县中学2022-2023学年高一下学期4月联考数学试题(已下线)江苏省南通市如皋市2021-2022学年高一下学期教学质量调研(二)数学试题江苏省南京市金陵中学河西分校2022-2023学年高二上学期期初调研测试数学试题江苏省沐阳县修远中学2021-2022学年高一下学期教学质量调研数学试题(二)
9 . 记
的内角A,B,C的对边分别为a,b,c,且
.
(1)证明:
的面积![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a174f393cdc7737dcd8cd144a97b4b.png)
(2)若
,求符合条件的k的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb878bdf9ba6fa8faebb97ea015e8f66.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a174f393cdc7737dcd8cd144a97b4b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3121fd871687354f811c68cbcb3f62c1.png)
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10 . 如图四棱锥
中,四边形
为等腰梯形,
,平面
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/19356418-47fb-41bf-a81f-5ce220893625.png?resizew=167)
(1)证明:
平面
;
(2)若
在线段
上,且
,求三棱锥
的体积.
![](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/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60efed4284aec260f792aaf14de11659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a301baf6cc0628366e6661a87a2d93ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c16d6c5ea2114ec8e4be8959219dd250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b937442ad4cc480adc11bb143559454.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/19356418-47fb-41bf-a81f-5ce220893625.png?resizew=167)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4739ad948445af72d585fe29c745929b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67819423fd2cd6c1977a526859a45285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068a6d4114b70330a766409501d1b368.png)
您最近一年使用:0次
2022-12-06更新
|
832次组卷
|
5卷引用:广西防城港市高级中学2023届高三上学期1月月考数学(文)试题
广西防城港市高级中学2023届高三上学期1月月考数学(文)试题广西邕衡金卷2023届高三上学期第二次适应性考试数学(文)试题四川省广安市第二中学校2022-2023学年高二上学期第二次月考数学(文)试题四川省泸县第一中学2022-2023学年高二上学期期末考试数学(文)试题(已下线)8.6.3平面与平面垂直(第2课时平面与平面垂直的性质定理)(精练)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)