1 . “
数”在量子代数研究中发挥了重要作用.设
是非零实数,对任意
,定义“
数”
利用“
数”可定义“
阶乘”
和“
组合数”,即对任意
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a95f14cc089b8615edde195eb449b48b.png)
(1)计算:
;
(2)证明:对于任意
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d17cd22aac1f1f0f8acb1d0b67bb2c7.png)
(3)证明:对于任意
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d774d4ac2fb5da679ac23e0dea64da0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6724c68c4206bd95683998d800f7f676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d774d4ac2fb5da679ac23e0dea64da0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0dee336ed12a9b1b273d7fada509737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d774d4ac2fb5da679ac23e0dea64da0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d774d4ac2fb5da679ac23e0dea64da0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3361528cb2e9a12d35acc0381e12564.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d774d4ac2fb5da679ac23e0dea64da0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dba6a7ab114b2a921dd1099e90c8bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a95f14cc089b8615edde195eb449b48b.png)
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d61962da2ebd6382d99cf5f1232c7de.png)
(2)证明:对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/110cb021ccb99d1a30025c66b026812b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d17cd22aac1f1f0f8acb1d0b67bb2c7.png)
(3)证明:对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41228f0077b249a875e69698fefb2081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/985b5678fd36804e1a28fac1c7a57982.png)
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2024-04-02更新
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1207次组卷
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2卷引用:山东省菏泽第一中学南京路校区2024届高三下学期开学考试数学试题
名校
2 . 在四棱锥
中,
是矩形,
为棱
上一点,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5130ddc74af23f8ccfaa5974a223e84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
A.点![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.四棱锥![]() ![]() |
D.直线![]() ![]() ![]() |
您最近一年使用:0次
3 . 已知
为抛物线
上的两点,
是边长为
的等边三角形,其中
为坐标原点.
(1)求
的方程.
(2)已知圆
的两条切线
,且
与
分别交于点
和
.
(i)证明:
为定值.
(ii)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6093eebca8f3ff82ce9298feb197e955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dac63b3d222a4cff8691da2d0d4489d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b717e5c29494c85955d5a80679ae71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4b833fb7dd03c34ac40c664cd8483d.png)
(i)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019d4ad2e3fb4a7abb66e0e9e55b556.png)
(ii)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd5ff3cfc044f329cd7ae0296683454.png)
您最近一年使用:0次
4 . 已知抛物线
是
上不同的三点,过三点的三条切线分别两两交于点
,则称三角形
为抛物线的外切三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/de6be247-499c-49a2-ba74-7c22577b9f6c.png?resizew=173)
(1)当点
的坐标为
为坐标原点,且
时,求点
的坐标;
(2)设外切三角形
的垂心为
,试判断
是否在定直线上,若是,求出该定直线;若不是,请说明理由;
(3)证明:三角形
与外切三角形
的面积之比为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/973328d4641ae9b8dd4cef0f9aa45979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d100e7830d2e9d27bdccb181c79b65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1264a2e3609e1c274acb89b5ea5019.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/de6be247-499c-49a2-ba74-7c22577b9f6c.png?resizew=173)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1af891c79ea7d8f50a0cd9464a83b436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6e4a2df58a236c20df5df0d29a466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
(2)设外切三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1264a2e3609e1c274acb89b5ea5019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(3)证明:三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1264a2e3609e1c274acb89b5ea5019.png)
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名校
5 . 假设直线
与曲线
相切,若切点唯一,则称直线
与曲线
单切;若切点有两个,则称直线
与曲线
双切;若
还与曲线
相交,则称直线
与曲线
交切.已知函数
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f2dd9bb80771308194bd57500b530.png)
A.直线![]() ![]() |
B.直线![]() ![]() |
C.直线![]() ![]() |
D.存在唯一的直线,与曲线![]() |
您最近一年使用:0次
2024-02-27更新
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551次组卷
|
4卷引用:山东省济南第一中学等校2024届高三下学期阶段性检测(开学考试)数学试题
名校
解题方法
6 . 已知甲植物生长了一天,长度为
,乙植物生长了一天,长度为
.从第二天起,甲每天的生长速度是前一天的
倍,乙每天的生长速度是前一天的
,则甲的长度第一次超过乙的长度的时期是( )(参考数据:取
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ec1e326713ddcd6dd66a24a809bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294e71b833e7a7a4711b829ff3164fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279c21a22d6a7ac8faed319940fe69d5.png)
A.第6天 | B.第7天 | C.第8天 | D.第9天 |
您最近一年使用:0次
2024-02-27更新
|
893次组卷
|
7卷引用:山东省济南第一中学等校2024届高三下学期阶段性检测(开学考试)数学试题
名校
解题方法
7 . 临沂一中校本部19、20班数学小组在探究函数的性质时,发现通过函数的单调性、奇偶性和周期性,还无法准确地描述出函数的图象,例如函数
和
,虽然它们都是增函数,但是图像上却有很大的差异. 通过观察图像和阅读数学文献,该小组了解到了函数的凹凸性的概念. 已知定义:设连续函数f(x)的定义域为
,如果对于
内任意两数
,都有
,则称
为
上的凹函数;若
,则
为凸函数. 对于函数的凹凸性,通过查阅资料,小组成员又了解到了琴生不等式(Jensen不等式):若f(x)是区间
上的凹函数,则对任意的
,有不等式
恒成立(当且仅当
时等号成立). 小组成员通过询问数学竞赛的同学对他们研究的建议,得到了如下评注:在运用琴生不等式求多元最值问题,关键是构造函数.小组成员选择了反比例型函数
和对数函数
,研究函数的凹凸性.
(1)设
,求W=
的最小值.
(2)设
为大于或等于1的实数,证明
(提示:可设
)
(3)若a>1,且当
时,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca6d68f1de3e70696f1d5d60affe6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca6d68f1de3e70696f1d5d60affe6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a7cd59277a15b4d9063be84a40d5541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca6d68f1de3e70696f1d5d60affe6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a4ab6155e1fd2c8f9508efa3adcda0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca6d68f1de3e70696f1d5d60affe6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f87a3affc8cd30c21af57157d156c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c6933733e82337e6d4a95fc2946ff26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2697ef67790838c84cc238a0334c5d47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83aa9d22736190332e01260e5a7803de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b7a76267b71e6fc828cf2a2e81173d.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21dd60e2cd1a1aae21a9c07820214290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0823f59998a025e80b46881993e89d1.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01262e3dd65728a29f3bbfa584dccede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7425d1d31f6188375d44137c2b219b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10cda4049695561dab3e0803c3a287fe.png)
(3)若a>1,且当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89c2336e46cbbe2b978d7d8fcd340be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc069f6b9d1623e1c06879cef933e42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2024-02-20更新
|
341次组卷
|
2卷引用:山东省临沂第十八中学2023-2024学年高一下学期2月收心考试数学试题
8 . 如图,在平面直角坐标系xOy中,矩形ABOC的顶点A的坐标为
,点B在x轴上,反比例函数
的图像分别交边AC,AB于点E,F(E,F不与A重合),沿着EF将矩形ABOC折叠,使点A落到点D处,连接AD,BD.若
是直角三角形,则k的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238f0ea276a00ae8d681ce00cc11c8ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/412de93a9a3a2dfbb727b793453c4196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/23/cae0c3df-5e90-49dc-bcb3-1c7e23bb9f8f.png?resizew=181)
A.![]() | B.6 | C.8 | D.![]() |
您最近一年使用:0次
9 . 在平面内,P,Q为线段AB外的两点,若以A,B,P,Q为顶点的四边形为矩形,则称P(或Q)为线段AB的“矩形关联点”.特别地,当该四边形为正方形时,称P(或Q)为线段AB的“正方形关联点”.
(1)在平面直角坐标系xOy中,点A的坐标为
,点B的坐标为
,若有点
,
,
,
,则其中:
①不是线段AB的“矩形关联点”的是 ;
②是线段AB的“正方形关联点”的是 ;
(2)如图①,在平面直角坐标系xOy中,点A,B的坐标分别为
,
,连接AB.若F是线段AB的“矩形关联点”,且点F在直线l:
上,求点F的坐标;
(3)如图②,在平面直角坐标系xOy中,已知点
,
,连接AB.点M的坐标为
,
的半径为1,试判断
上是否存在线段AB的“正方形关联点”,且使线段AB恰为正方形的对角线.若存在,请求出点M的横坐标a的取值范围;若不存在,请说明理由.
(1)在平面直角坐标系xOy中,点A的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d591091748b2622b84ad57f1f7ee11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cc67874b4cb2d056bd94c625b80985e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9ed07af111a952bd21f86d92d48ab8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35236ea311b7a8c0a85456d05d890f52.png)
①不是线段AB的“矩形关联点”的是 ;
②是线段AB的“正方形关联点”的是 ;
(2)如图①,在平面直角坐标系xOy中,点A,B的坐标分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1a65d88f9823d49da8f3b96ea9ec6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ac26e96e88e534c9e868452d5082ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/a085299e-3fdc-4411-a1c3-90b0c91d06d4.png?resizew=108)
(3)如图②,在平面直角坐标系xOy中,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d4def6118ab6cb1e4b8134a1a153ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93842cf36b1107534c3904d18ba3ae5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/237af55c09b6bab548d3e321e2456413.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/509264fb-b91a-4f30-aba7-5c56508f3e29.png?resizew=122)
您最近一年使用:0次
10 . (1)已知P为
平分线上的一点,作射线PA,PB,分别交OM,ON于点A,B.
①如图①,当
,
时,求证:
;
②如图②,若OA,OB,OP满足
,令
(
),
,连接AB,请用含
的式子分别表示
的度数和
的面积;
(2)如图③,在平面直角坐标系xOy中,C是函数
图象上的一点.过点C的直线AB分别交x轴和y轴于A,B两点,且满足
,若P为
平分线上的一点,且满足
,请求出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
①如图①,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a563c50a7f6d10fa46339d7107fc85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fddda9e7f4d7140bf357d76c9e23d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7210c6456f176a922bfa6f20dc27a0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/22/fbc6c7b9-0a31-41b8-9a79-d0bce07543b6.png?resizew=150)
②如图②,若OA,OB,OP满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7210c6456f176a922bfa6f20dc27a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a84261efd0ff6fafdc55cd446c1a5f68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708d48b595c17d4dccf9b4086d7e664e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07445aa3909818a3ef93bb01182f545f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/22/4b78bff6-9fd9-4a14-b1e5-369c83086e22.png?resizew=150)
(2)如图③,在平面直角坐标系xOy中,C是函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71de4ef51a5b73cc7eae71c73c3cc26f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/949c54239b18a0e5ebde26d120362f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7210c6456f176a922bfa6f20dc27a0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/22/792775c1-1a13-4456-9caa-c7631e3245d7.png?resizew=149)
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