1 . 线性方程组的增广矩阵为
解为
,则三阶行列式
值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2f5fbd996eaa0ee83a8b03e9ebd74c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d16e32287eea185bb1113f4c6a42603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3c6eb5bcedd2af1b18cfc1e3d84762.png)
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2 . 若全集
,且不等式
的解集为A,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715476727accc3c6b3c71f2f25c3aaad.png)
____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a64dc61989ca50b9ee19d835c4ed268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea5581c58da494babc90145da4de4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715476727accc3c6b3c71f2f25c3aaad.png)
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解题方法
3 . 在平面直角坐标系
中,若在曲线
的方程
中,以
(
为非零的正实数)代替
得到曲线
的方程
,则称曲线
、
关于原点“伸缩”,变换
称为“伸缩变换”,
称为伸缩比.
(1)已知
的方程为
,伸缩比
,求
关于原点“伸缩变换”所得曲线
的方程;
(2)射线
的方程
(
),如果椭圆
:
经“伸缩变换”后得到椭圆
,若射线
与椭圆
、
分别交于两点
、
,且
,求椭圆
的方程;
(3)对抛物线
:
,作变换
,得抛物线
:
;对
作变换
得抛物线
:
,如此进行下去,对抛物线
:
作变换
,得
:
若
,
,求数列
的通项公式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bbbf52d1f9d61b41bdd4acfc9fac268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b4a5238402bff57cc8c915a07d93e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3dc8adc012d6051c2494aebbe924ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42e1d3efac50e8a51b7dd8bd9c29297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec547b073f963a99feadb396f8ed0a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2f2d7c81cb44416bcdf59419637682.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91a18f8751aa1008f1e43516a588207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d12ebd10f6c0bcf98be52c32b107f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.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/5ff1c07d3ab5f594be5fffe13ebaaccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(3)对抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30cc27e0e77e2e2eefae00d4d72c321a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ec829a0e5e46cb89b9be3e2474f2fc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213a9f11bdbfb3eadef6373631a30987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41dbefa0a0aa359a885792f264b82c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab94459e87c666facddbe1a23ae1899d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6095acaf330fa590f0a5ee02d10849a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404699b2c820c8a6816ba6e9132a3348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18fd09da62944f8db414b9044016f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ef5e3261e7ba88ac6ee3a4bb39c447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f17541060bfb1ae98c20ebd4dea07b14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5cfb0d2cf24c1da7ba972e0218a974.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353518b530f418e3b507d73d46a9d4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960b682f983b053dc9064cf29c97e250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffb021aa7d5a5c2f0691e337caad624.png)
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2020-12-03更新
|
997次组卷
|
6卷引用:上海市松江二中2021届高三上学期期中数学试题
上海市松江二中2021届高三上学期期中数学试题(已下线)热点07 解析几何-2021年高考数学【热点·重点·难点】专练(上海专用)高中数学解题兵法 第一百二十讲 环肥燕瘦——奇异美(已下线)【一题多变】仿射变换 性质良好江苏省南京市南京师大附中2024届高三寒假模拟测试数学试题江苏省盐城市东台市安丰中学等六校2024届高三下学期4月联考数学试题
4 . 关于
、
的二元线性方程组
的增广矩阵经过变换,最后得到的矩阵为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdf69d50dffe8bdae2580c7e71e5eae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26767c2e9097931dc4c0c5cdb23d7b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
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5 . 已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97a5bc3447232182b769992efe8248c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90f12969403db37bb2010f9b0416ed3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
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6 . 行列式
中元素3的代数余子式的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/691c9b88cdf1cc3ad2879d836f047e01.png)
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2020-12-03更新
|
42次组卷
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2卷引用:上海市曹杨二中2020-2021学年高二上学期期中数学试题
7 . 已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b5b8ac661edbca9ad5d1dcbececd90c.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97a5bc3447232182b769992efe8248c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ae200f06d3d7e53adfe7282cabd36e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b5b8ac661edbca9ad5d1dcbececd90c.png)
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8 . 已知函数
,在7行7列的矩阵
中,
,则这个矩阵中所有数之和为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c031ffb791dee52ca53fec7ece0730c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f3a25e36e9b17c8cf2e926a50476fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecda7ab9f3cba4d614b52893246f0b14.png)
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9 . 已知关于
、
的二元一次方程组
.
(1)写出系数矩阵和增广矩阵;
(2)讨论解的情况.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a5432a0fb65e1536c39dcbb8ff80e2.png)
(1)写出系数矩阵和增广矩阵;
(2)讨论解的情况.
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10 . 在
中,角A、B、C的对边分别为a、b、c,若
,则角A的大小为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1ba88bf979183632e7d26670bbecbe.png)
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