1 . 某兴趣小组的几位同学在研究不等式
时给出一道题:已知函数
.函数
,当
时,
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49506c61cf5c61605f1cf90a440348cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839d60adc0333253aff4000673646bc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21635ed9d41451f918e47451d7326465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a18be85a0cd3aff37be9ba7f1bdea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
2 . 数值线性代数又称矩阵计算,是计算数学的一个重要分支,其主要研究对象包括向量和矩阵.对于平面向量
,其模定义为
.类似地,对于
行
列的矩阵
,其模可由向量模拓展为
(其中
为矩阵中第
行第
列的数,
为求和符号),记作
,我们称这样的矩阵模为弗罗贝尼乌斯范数,例如对于矩阵
,其矩阵模
.弗罗贝尼乌斯范数在机器学习等前沿领域有重要的应用.
(1)
,
,矩阵
,求使
的
的最小值.
(2)
,
,,矩阵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880f9f9ab3fcb2dfdfc14d0ab8582fb9.png)
求
.
(3)矩阵
,证明:
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860fc1db2edc066188f8d24e35dbf205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332153dce658c8cc26984e355b7c15ae.png)
![](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/23c529cf68fc1e9a4f9ab4dfbadcfe01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61bb39d4f4036ceed78844592288c408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a14c188b1c9d61aa237b137ba18023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5550d8659980c02488a57afd5964ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/747bedda3150eb258ffb25c923a47614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c297fac2721a2c7bbaa60b0274dbc34f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de651a4843a0cdbf9e26e51f9c53e837.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83986d667f7618313804888470393a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6abaf4851fb819b325eb5d21cd0260.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7013adffb807e769979945ba9aa0809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83986d667f7618313804888470393a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880f9f9ab3fcb2dfdfc14d0ab8582fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f922593fce42b4d7e592e51873aa2ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd8a93d9cf3359a0ad6106ea5360acb.png)
(3)矩阵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6bed24376a5b1ea247ffb1552eaaf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83986d667f7618313804888470393a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f823d5ffe45a61c388710e7a67fd02.png)
您最近一年使用:0次
3 . 定义一种新的运算“
”:
,都有
.
(1)对于任意实数a,b,c,试判断
与
的大小关系;
(2)若关于x的不等式
的解集中的整数恰有3个,求实数a的取值范围;
(3)已知函数
,
,若对任意的
,总存在
,使得
,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3c2f679d53b91088ba6eb14c16cbc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2671f593186fa00f17ad26eba7b8f3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a8c23336002eb5d7c478479fcda799f.png)
(1)对于任意实数a,b,c,试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fda9c56c7993236c0ebdfe08d110ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b98e8a20e1e3d328265269df6b2927ad.png)
(2)若关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80fef6a2dd7e822d83ae45ea79a5357.png)
(3)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fc1f7733bebb86885b6e6fd0534e1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d8b60555f0d82c386c5b935c23ff952.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12965bbc260bdbb0df0a110e59fb8d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93bf66ef253242900ca1702121238b14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52dc0bb1b1d25a0e86babc0edc627e44.png)
您最近一年使用:0次
2023-07-11更新
|
527次组卷
|
3卷引用:山东省青岛市莱西市2022-2023学年高二下学期期末数学试题
名校
解题方法
4 . 已知a、b、c、s为
ABC的三边与面积,记B=x
(0,
),f(x)=cos(3
- x)sin(
- x)-
+![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1be16a6d8e9d57fa10a6d71024f32fe.png)
(1)求f(x)的最大值g(a)
(2)在(1)条件下,是否
a,f(x)> g(a) -
对于
(0,
)恒成立.若不存在,求出B的取值范围,否则说明理由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de12bbd5097debc83d6a46364589748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e464cfcfd04f2a854576da147507293.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c71eb97845b3aa929c93647e16ed5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59c94dc4ecc887bad4e1d59b0e35979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1be16a6d8e9d57fa10a6d71024f32fe.png)
(1)求f(x)的最大值g(a)
(2)在(1)条件下,是否
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50238fc5bb1ada109e5f8ab7138d5522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c87aff9436b51b9ab3169daddb6675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a537a02d1f7b53785701cba9de358774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de12bbd5097debc83d6a46364589748.png)
您最近一年使用:0次
名校
5 . 平面内到两定点距离之积为常数的点的轨迹称为卡西尼卵形线,它是1675年卡西尼在研究土星及其卫星的运行规律时发现的.已知在平面直角坐标系
中,
,
,动点P满足
,其轨迹为一条连续的封闭曲线C.则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8547f2b4e89b0ae1445bda02d46f0668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e258dc5c8b4ea30bca80a56098065402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a9b944e7f76bd28e2a6514dd8aac38.png)
A.曲线C与y轴的交点为![]() ![]() | B.曲线C关于x轴对称 |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
2022-03-24更新
|
2607次组卷
|
6卷引用:山东省济南市2022届高三模拟考试数学试题(3月)
山东省济南市2022届高三模拟考试数学试题(3月)(已下线)必刷卷03-2022年高考数学考前信息必刷卷(新高考地区专用)河北省沧州市任丘市第一中学2023届高三上学期期中数学试题河北省2023届高三模拟数学试题内蒙古呼和浩特市新城区呼市十四中学2023-2024学年高二上学期期中数学试题(已下线)技巧03 数学文化与数学阅读解题技巧(4大核心考点)(讲义)