名校
1 . 设
,
.
(1)若x,y均为锐角且
,求z的取值范围;
(2)若
且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d018fc39fe3a5feee51a08ee8c58483e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ebed1b93046c28dd4ce381df0ca441f.png)
(1)若x,y均为锐角且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3085600fba3d8ce8403ddc8b44996f88.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7204495706847fd4c8abc55e89c9a35f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598caae9102ce0b49bdd2ea12189562d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eca80d80b6e1577762585b69145736b.png)
您最近一年使用:0次
2024-06-13更新
|
50次组卷
|
3卷引用:四川省成都市树德中学2023-2024学年高三下学期适应性考试数学(文)试题
解题方法
2 . 已知椭圆
,其左、右焦点分别为F1,F2,离心率
,点P为该椭圆上一点,且△F1PF2的面积的最大值为
.
(2)过椭圆C的上顶点B作两条互相垂直的直线,分别交椭圆C于点D、E,求线段DE长度的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c7316976a221c051a2c14df80b1347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(2)过椭圆C的上顶点B作两条互相垂直的直线,分别交椭圆C于点D、E,求线段DE长度的最大值.
您最近一年使用:0次
名校
3 . 已知抛物线
的焦点为
,过点
作抛物线
的两条切线,切点分别为
.
(1)求抛物线
的方程;
(2)过点
作两条倾斜角互补的直线
,直线
交抛物线
于
两点,直线
交抛物线
于
两点,连接
,设
的斜率分别为
,问:
是否为定值?若是,求出定值;若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc8a0882009d0dde1aa8dc897a0826b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381c8858e32fecc0182404040eed2703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea7d27771fff2bfa4b61115071c2e3ff.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45e983f6a53815ba53c80b3212615585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a0c3c11295fc201b29082345804dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11965323b5bbb8392fe0c5d727726dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480b002d43bf719789cc855838c06464.png)
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名校
4 . 设
,
(1)解不等式:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd3435b82dc1ce5ed6433a9262ac531.png)
(2)设
的最大值为
,已知正数
和
满足
,令
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48e2d4ecf56e737137fba9bbc9e131e8.png)
(1)解不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd3435b82dc1ce5ed6433a9262ac531.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/034a0f4d3755f5f4934e5f11b1296c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae71a012d99ef5c2ffdf175f1b5bfd61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
您最近一年使用:0次
2024-06-06更新
|
61次组卷
|
3卷引用:四川省成都石室中学2024届高三下学期高考适应性考试(一)理科数学试题
5 . 已知函数
.
(1)当
时,求
的极值;
(2)若
恒成立,求实数
的取值范围;
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b48e39514c9e9909e94fc5745355cfa.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58196b9e63ec00aa1119052b6de6ae12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6274961e116aff1637d4bc3ac4944ce5.png)
您最近一年使用:0次
2024-05-25更新
|
754次组卷
|
5卷引用:四川省成都市郫都区2024届高三上学期阶段检测(三)文科数学试卷
解题方法
6 . 在
中,内角A,B,C的对边分别为a,b,c,已知
的面积
.
(1)求
;
(2)若
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5ad9a1014f7e16d43bd1abcca96086.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a24a8f5e8fb89381f8add6549170345.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/809bf8b2fd832a47900a4a90f66c826a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfa04ed69eb5e36931c076e0cf3f01e.png)
您最近一年使用:0次
名校
解题方法
7 . 数据显示,中国在线直播用户规模及在线直播购物规模近几年都保持高速增长态势,某线下家电商场为提升人气和提高营业额也开通了在线直播,下表统计了该商场开通在线直播的第x天的线下顾客人数y(单位:百人)的数据:
x | 1 | 2 | 3 | 4 | 5 |
y | 10 | 12 | 15 | 18 | 20 |
(1)根据第1至第5天的数据分析,计算变量y与x的相关系数r,并用r判断两个变量y与x相关关系的强弱(精确到小数点后三位);
(2)根据第1至第5天的数据分析,可用线性回归模型拟合y与x的关系,试求出该线性回归方程并估计该商场开通在线直播的第10天的线下顾客人数.
(参考公式:相关系数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7942c01e3c2640f43f14ac0c77f2eab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17509f03e35825ee967838ee7f03776f.png)
回归方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1f1cdb7ab5915007ea605da8482c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ebff20f21ae41fd8d1f1e3145895842.png)
您最近一年使用:0次
2024-04-01更新
|
1145次组卷
|
3卷引用:四川省成都市郫都区2024届高三上学期阶段检测(三)文科数学试卷
8 . 数据显示,中国在线直播用户规模及在线直播购物规模近几年都保持高速增长态势,某线下家电商场为提升人气和提高营业额也开通了在线直播,下表统计了该商场开通在线直播的第x天的线下顾客人数y(单位:百人)的数据:
x | 1 | 2 | 3 | 4 | 5 |
y | 10 | 12 | 15 | 18 | 20 |
(1)根据第1至第5天的数据分析,可用线性回归模型拟合y与x的关系,试求出该线性回归方程并估计该商场开通在线直播的第10天的线下顾客人数;
(2)为进一步提升该商场的人气,提高营业额,该商场进行了摸球中奖回馈客户活动,商场在出口处准备了三个编号分别为1,2,3的不透明箱子,每个箱子中装有除颜色外大小和形状均相同的24个小球(其中1号箱子中有18个红球,6个白球;2号箱子中有16个红球,8个黄球;3号箱子中有12个红球,12个蓝球)且含有自动搅拌均匀装置.规则如下:在该商场购物的顾客凭购物小票均有一次参加此活动的机会,从三个箱子里各摸出一个小球(摸完后再依次放回),若摸出的3个小球颜色相同便中奖.若小明和他的3个朋友购物后均参加了该活动,且每人是否中奖相互独立,记这4人中中奖的人数为X,求X的分布列与期望.
(参考公式:回归方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1f1cdb7ab5915007ea605da8482c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ebff20f21ae41fd8d1f1e3145895842.png)
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解题方法
9 . 已知函数
.
(1)若
恒成立,求实数
的值;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2230568818911397d7b151dda758fc58.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade2a39015ce080f68a6e3e2992b1d16.png)
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10 . 在平面直角坐标系
中,直线
的参数方程为
(
为参数),以坐标原点为极点,
轴的非负半轴为极轴且取相同的单位长度建立极坐标系,曲线
的极坐标方程为
.
(1)求直线
的极坐标方程和曲线
的直角坐标方程;
(2)若
,直线
与曲线
交于
两点,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ae61ac8bd92f22b7f4c824ae70d8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460a6560a9e63845a215d36737883714.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9b5e076078240e0c5ad9763a9824d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1b3031d7393a63719166285314d73f.png)
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