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1 . 初中学过多项式的基本运算法则,其实多项式与方程的根也有密切关联.对一组变量
,幂和对称多项式
,且
;初等对称多项式
表示在
中选出
个变量进行相乘再相加,且
.例如:对
.已知三次函数
有3个零点
,且
.记
,
.
(1)证明:
;
(2)(i)证明:
;
(ii)证明:
,且
;
(3)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe1c31a81f198c443e71b83ca662939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74b85069b184b032808ce05636373b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d15873316d0c17fbcbbe376834e5697.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b63239fb9313458d7f86b64d2860beba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe1c31a81f198c443e71b83ca662939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fba0d57c2c8fcc1cef3a02b67d4193b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca373f163399198a6beb169fe6df5262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef4ab1ca44d62d6451f85e41258abe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5f85f6501033a93c8be7363d59c8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/489340c9a2d70c00bae13b7018cad448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93e7bb2538cf1dcb50722aa9cf0550c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38c64a6143b210aa315e0b6bfaccf94.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e856070d58b6aefce7e914426d7f95c.png)
(2)(i)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549ef2a5b6592308c2da9233aca63e77.png)
(ii)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6429dd74013b8984de8dcaac9c862957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52121b304f70afcb2dfb3d4a614f7224.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d177a7489e327bff83e61ac1eeaaf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5235bf88c507cd6178e94914133d04.png)
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解题方法
2 . 已知点
是抛物线
上不同三点,直线
与抛物线
相切.
(1)若直线
的斜率为2,线段
的中点为
,求
的方程;
(2)若
为定值,当
变动时,判断
是否为定值,若为定值,求出该定值;若不为定值,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35644a7d25d0410409238f52c8818083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e39bd21af422662049290a3aa4841b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e325d1e4485ec4cfb3d7bb038d675d7d.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18fe48905f1e58b2fe08706c2f53b55c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13d726b14a313e000a81526162f35748.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3c5a4887dfe02b02ee90d740151e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1835c6f51b4471243b5e1a3d6e74c203.png)
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解题方法
3 . 设
,记
,若
,
,则称A为
中的一个移位集,
为A的一个移位数.记A中的元素个数为|
.
(1)判断下列集合是否是
中的移位集.若是,求出相对应的移位数.
①
,
②
;
(2)若
中所有满足
的集合A都是移位集,求m的最大值;
(3)对任意满足
的集合A都是
中的移位集,求n的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42b8b0bc774a1a88cea41abb4e47e3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b938a9b748bf1590ea5a6652669643c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d5fa78bfaa823a1d09ab57208532d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2fc2224e26690053448db851fbcbe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d9fd58e71dcae6cafaf9037d20ebd76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4978089eb165d2241a35275396794d06.png)
(1)判断下列集合是否是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a48e81b54f78b96294295542b010dfb.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b89a8282cafe1769891b39ec8c0102.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f255c4c9acc49c187ab5990228480c9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05201ef79a5d5904f492845396fb5470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df91ed9bc04acc7b2edb6b522b953efb.png)
(3)对任意满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500aee7a5f2fa5c8cfc6f55b66546024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2021-10-27更新
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4卷引用:江西省吉安市第三中学2021-2022学年高二10月第一次段考数学(理)试题
江西省吉安市第三中学2021-2022学年高二10月第一次段考数学(理)试题黑龙江省哈尔滨市第三中学2021-2022学年高一上学期第一次验收考试数学试题(已下线)突破1.3集合的基本运算(重难点突破)(已下线)第1章 集合与常用逻辑用语(基础、典型、新文化、压轴)分类专项训练-2022-2023学年高一数学考试满分全攻略(人教A版2019必修第一册)
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解题方法
4 . 如图所示,在平面四边形
中,已知
,
,
,记
的中垂线与
的中垂线交于一点
,恰好
为
的角平分线,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de00c1f5a077f32bbd131614b6ae4c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3b55f5f7075d1e9cb681db6f3513d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f90318c1a8d868d69fba0e8ab960bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e0f366d1c0fdc80f78156df8b248b4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8卷引用:江西省万安中学2021-2022学年高二上学期开学考试数学(理)试题
江西省万安中学2021-2022学年高二上学期开学考试数学(理)试题江苏省南京师范大学附属中学新高考方向卷2020-2021学年高一下学期期末数学试题(已下线)专题4-2 正余弦定理与解三角形小题归类1-2022年高考数学毕业班二轮热点题型归纳与变式演练(全国通用)山东省齐鲁2021-2022学年3月份高一阶段性质量检测试卷A 江苏省南京市金陵中学2021-2022学年高二下学期6月适应性考试数学试题2023年3月河北省普通高中学业水平合格性考试模拟(十)数学试题(已下线)第11章 解三角形 单元综合检测(难点)--《重难点题型·高分突破》(苏教版2019必修第二册)(已下线)压轴小题14 定角类解三角形问题
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5 . 地球仪是地理教学中的常用教具.如图1所示,地球仪的赤道面(与转轴垂直)与黄道面(与水平面平行)存在一个夹角,即黄赤交角,大小约为23.5°.为锻炼动手能力,某同学制作了一个半径为4cm的地球仪(不含支架),并将其放入竖直放置的正三棱柱
中(姿态保持不变),使地球仪与该三棱柱的三个侧面相切,如图2所示.此时平面
恰与地球仪的赤道面平行,则三棱柱
的外接球体积为___________ .(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1d0c436005a91b1a0a5f8d87d4bc6d.png)
![](https://img.xkw.com/dksih/QBM/2021/6/27/2751832374763520/2760016918478848/STEM/49fe51dd-4e3f-4171-b87d-605a0b3f8d25.png?resizew=447)
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3卷引用:江西省吉安市第一中学2024届高三“九省联考”考后适应性测试数学试题(一)
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6 . 如图,已知
和抛物线
是圆
上一点,M是抛物线
上一点,F是抛物线
的焦点.
![](https://img.xkw.com/dksih/QBM/2021/6/3/2735096321589248/2735881169477632/STEM/8efff9db-ef21-4bae-9de0-f271f0870ffd.png?resizew=181)
(1)当直线
与圆
相切,且
时,求
点的坐标;
(2)过P作抛物线
的两条切线
分别为切点,求证:存在两个
,使得
面积等于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77208a2d8eef1856d213fde4b88805f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451e94c94277ef7d8e74f3dfef159880.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/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://img.xkw.com/dksih/QBM/2021/6/3/2735096321589248/2735881169477632/STEM/8efff9db-ef21-4bae-9de0-f271f0870ffd.png?resizew=181)
(1)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ced5c43c74f54a3a7ceb1bdf6260a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)过P作抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/270dcf5882716678ef574e71273e0a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb57d84f9bbcb3e30d4ce7e2e1e8604.png)
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5卷引用:江西省泰和中学2021-2022学年高二上学期第一次段考数学(理)试题
江西省泰和中学2021-2022学年高二上学期第一次段考数学(理)试题浙江省杭州市高级中学2021届高三下学期高考仿真模拟数学试题(已下线)第4讲 圆锥曲线中的最值、范围、存在性问题(练)-2022年高考数学二轮复习讲练测(新教材·新高考地区专用)宁夏回族自治区银川一中2022届高考三模数学(理)试题福建省厦门双十中学2022届高三下学期高考热身考试数学试题