1 . 已知集合
,且
.
(1)判断
是否为
中元素
(2)设
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ca653cad7e7730a8e03b55d0cd1a85.png)
(3)证明:若
,则
是偶数;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bf7926d4460da0d09ebab079fdc13e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d72bf44a312d976cb458311c73b7fb7.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f3aa35fae3f1e1afdd5386c172d517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac385ec112e6d61b90d953e3f106ee85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ca653cad7e7730a8e03b55d0cd1a85.png)
(3)证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13f40c24c64bbb0645fcf585f4e66872.png)
您最近一年使用:0次
名校
解题方法
2 . 《九章算术》是中国古代的一部数学专著,其中将由四个直角三角形组成的四面体称为“鳖臑”.在直四棱柱
中,E,F分别为线段
与
上的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/f7cf584e-2883-4fde-ba37-56da5520cc3a.png?resizew=157)
(1)求证:
平面
;
(2)从三棱锥
中选择合适的两条棱填空:__________⊥__________,使得三棱锥
为“鳖臑”;并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/f7cf584e-2883-4fde-ba37-56da5520cc3a.png?resizew=157)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
(2)从三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38593653bedb845ecfa820806a29a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38593653bedb845ecfa820806a29a1e.png)
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2021-08-07更新
|
374次组卷
|
2卷引用:江苏省淮安市2020-2021学年高一下学期期末数学试题
名校
解题方法
3 . 首项为1的正项数列
的前n项和为
,数列
的前n项和为
,且
,其中P为常数.
(1)求P的值;
(2)求证:数列
为等比数列;
(3)设
的前n项和
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7118a8dab6f8e5346ebc3788cea66e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c13bdac57d75752a23e1a7560295e2.png)
(1)求P的值;
(2)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a44cfbb86a4eb76261c00ddc6bff181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2df08c8fdd18fd6320031df89a0b33.png)
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4 . 证明不等式
(1)已知
,证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d83e848867829e2ac31d60bb9ef902.png)
(2)设
,求证:
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf04fe8895c10624636a815d3d752975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d83e848867829e2ac31d60bb9ef902.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/044b0aa13a404dc0b94df51707adbf27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78f7c0a9a5ea5a40df5f753deba43188.png)
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2020-12-02更新
|
319次组卷
|
6卷引用:江苏省淮安市阳光学校2020-2021学年高一上学期第二次月考数学试题
江苏省淮安市阳光学校2020-2021学年高一上学期第二次月考数学试题(已下线)大题能力提升考前必做30题-2020-2021学年高一数学期末考试高分直通车(沪教版2020,必修一)(已下线)第二单元 (综合培优)一元二次函数与方程、不等式 B卷-【双基双测】2021-2022学年高一数学同步单元AB卷(人教A版2019必修第一册)(已下线)2.3平均值不等式证明(第1课时)沪教版(2020) 必修第一册 精准辅导 第2章 2.3(2) 平均值不等式及其应用(2)(已下线)江苏省常州市金坛区2023-2024学年高一上学期期中质量调研数学试卷
5 . 某同学在研究二项式定理的时候发现:
其中
为
的系数,它具有好多性质,如:①
;②
;③
;请借助于该同学的研究方法或者研究成果解决下列问题:
(1)计算:
;(请用数字作答)
(2)若
,且
,证明:
;
(3)设数列
,
,
,…,
是公差不为0的等差数列,证明:对任意的
,函数
是关于x的一次函数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee4921ae27ca39424685c8d48fcad66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb4fb20d3a3a67baa8505623e0bd9de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419279baeef6eb671bedee00d046b96c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0540c6aa4a066b653fa303fb2f7e984c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28358a9b687fea8091fb586066e149ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e10e0bb04d7d261d880aea655e19db1.png)
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f43b7aada649818eff36aafab684f32.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d330401bef4e7e848b6334ad7e1f944.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15227e8caefd537bde2d857fc323d94d.png)
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名校
6 . 如图,在斜三棱柱
中,
是边长为2的正三角形,
是以AC为斜边的等腰直角三角形且侧面
底面
,点
为
中点,点
为
的中点.
平面
;
(2)求平面
与平面
夹角的正弦值.
(3)过
作与
垂直的平面
,交直线
于点
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a715009a5804dc935ade37f5ac51591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(3)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
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2024-04-01更新
|
457次组卷
|
3卷引用:江苏省淮阴中学2023-2024学年高二下学期级阶段测试(一)数学试卷
解题方法
7 . 已知函数
,
.
(1)函数
在
上单调递增,求实数a的取值范围;
(2)当
时,对任意
,关于x的不等式
恒成立,求实数a的取值范围;
(3)当
,
时,若点
,
均为函数
与函数
图象的公共点,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f779eb0eb4e0ca4a92b20fe9b77be3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f588722d20a51f2e43f9318589b3d6.png)
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3b2856045b940760ebabe6606df19a6.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8c164755dc2d7cff80fb4c9cffc9be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa18838a13fda4e45612c32cdf98b71.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4c78214e43a8b93f2a57072033cbcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac9eb4f13a6ec140f7050e8d7dde52c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b225d772013d021cf1bfe7b9421fa5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b7e35faab6d74fa0c36599c39d1698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ed427e67d7d27d53df7039cca81038.png)
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名校
8 . 如图1,已知
是直角梯形,
,
,
,C、D分别为BF、AE的中点,
,
,将直角梯形
沿
翻折,使得二面角
的大小为
,如图2所示,设N为
的中点.
;
(2)若M为AE上一点,且
,则当
为何值时,直线BM与平面ADE所成角的余弦值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25eff69a4a0dc7a7ab183843303d333.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a64f0bc01c1dbf0b4b87763141d8059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/085b59baa6aaeab11a2efda83603724b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4901a7eda97d6a307db76c4fb196ba3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61bfc65bfbc357d43069e9aad18f8625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bdadcc147a7e441decf7561c9e7310e.png)
(2)若M为AE上一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668c259a8971e91fcc2867bed20ca3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d172f55bc57ef5b5c2c1ad5b167440b2.png)
您最近一年使用:0次
2024-03-25更新
|
370次组卷
|
4卷引用:江苏省洪泽中学等七校2023-2024学年高二下学期第一次联考数学试卷
江苏省洪泽中学等七校2023-2024学年高二下学期第一次联考数学试卷河南省信阳高级中学2023-2024学年高二下学期4月测试(一)数学试题(已下线)模块4 二模重组卷 第2套 复盘卷(已下线)专题01 空间向量与立体几何解答题必考题型(6类题型)-备战2023-2024学年高二数学下学期期末真题分类汇编(江苏专用)
名校
9 . 如图,在三棱柱
中,四边形
为正方形,四边形
为菱形,且
,平面
平面
,点
为棱
的中点.
;
(2)棱
上是否存在异于端点的点
,使得二面角
的余弦值为
?若存在,请指出点
的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b50457924bc12b20b88f5e85cb0ac73e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98413205ebd1c689855bd6ba189156c8.png)
(2)棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2461406d3672cd70cb59ec7f166feaa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6265f5256804ccaff618cf8c0675eb8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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2024-03-06更新
|
924次组卷
|
5卷引用:江苏省盱眙中学2023-2024学年高二下学期第一次学情调研数学试题
10 . 已知直线
.
(1)如果点
在直线上,求k的值;
(2)证明:直线l与圆
相交,并求相交弦的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/885c66b141c664ff4a367fd85b337fa9.png)
(1)如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d521c9bf37ce287bc559b016d79e1101.png)
(2)证明:直线l与圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08227ca941898eb34941f446ca8b1de8.png)
您最近一年使用:0次