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解题方法
1 . 已知某系统由一个电源和并联的
三个元件组成,在电源电压正常的情况下,至少一个元件正常工作才可保证系统正常运行,电源及各元件之间工作相互独立.
(1)电源电压
(单位:
)服从正态分布
,且
的累积分布函数为
,求
.
(2)在统计中,指数分布常用于描述事件发生的时间间隔.已知随机变量
(单位:天)表示某元件的使用寿命,
服从指数分布,其累积分布函数为
.
(ⅰ)设
,证明:
;
(ⅱ)若第
天只有元件
发生故障,求第
天系统正常运行的条件概率.
附:若随机变量
服从正态分布
,则
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
(1)电源电压
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515c70580e9f247fe27b2f0c964bc5ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/166b72040b0aa1e70564fa174b91f6b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb8c83d6dd000e7c0180d91ed146a90.png)
(2)在统计中,指数分布常用于描述事件发生的时间间隔.已知随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85d377090d1f35e2b0f2061052e238a8.png)
(ⅰ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f9a9793d0ce6ccb20dc7972d59e73f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7ac9cc03bbbb308beaa88f424fc1dc.png)
(ⅱ)若第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
附:若随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f77553716bd8b2f4680893d6d496b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbd61d3462563f0964a9fde5537eaef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42373c7a83e1e876aa12d7e6ac028a17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28613181e6953c9858da252bfd62c569.png)
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2 . 在概率统计中,常常用频率估计概率.已知袋中有若干个红球和白球,有放回地随机摸球
次,红球出现
次.假设每次摸出红球的概率为
,根据频率估计概率的思想,则每次摸出红球的概率
的估计值为
.
(1)若袋中这两种颜色球的个数之比为
,不知道哪种颜色的球多.有放回地随机摸取3个球,设摸出的球为红球的次数为
,则
.
(注:
表示当每次摸出红球的概率为
时,摸出红球次数为
的概率)
(ⅰ)完成下表,并写出计算过程;
(ⅱ)在统计理论中,把使得
的取值达到最大时的
,作为
的估计值,记为
,请写出
的值.
(2)把(1)中“使得
的取值达到最大时的
作为
的估计值
”的思想称为最大似然原理.基于最大似然原理的最大似然参数估计方法称为最大似然估计.具体步骤:先对参数
构建对数似然函数
,再对其关于参数
求导,得到似然方程
,最后求解参数
的估计值.已知
的参数
的对数似然函数为
,其中
.求参数
的估计值,并且说明频率估计概率的合理性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/613f6de938db4bb3a7f98226d3a4c793.png)
(1)若袋中这两种颜色球的个数之比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5881f1ce9b4172ca346032d0fd1e3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fadbd1d2d0294d04834dde31e0e4caaf.png)
(注:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c74de541a96a252ca6b4bf05381a03ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(ⅰ)完成下表,并写出计算过程;
0 | 1 | 2 | 3 | |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c74de541a96a252ca6b4bf05381a03ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf2e58249dd993ae42a7bd6d9ba0005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf2e58249dd993ae42a7bd6d9ba0005.png)
(2)把(1)中“使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c74de541a96a252ca6b4bf05381a03ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf2e58249dd993ae42a7bd6d9ba0005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0807dbbfdeeaeffd987c4de037b892f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb13cf58c2aa7591391cfa8d515dc64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1aecbef5ad07da9949972dbcb9d659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21d19789d426d0ed871d45ac6175f66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/889b80977780bb8caec3c90954b91a21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
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3 . 在
中,内角
所对的边分别是
且
.
(1)求角
;
(2)若
,求边
上的角平分线
长;
(3)求边
上的中线
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213914a18e08bdb1821b02bb8d278212.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e658a5aee39ea75e9076aed714ee451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)求边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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3卷引用:浙江省东阳市外国语学校2023-2024学年高二下学期5月月考数学试题
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解题方法
4 . 现有
个编号为
的小球,随机将它们分成甲、乙两组,每组
个. 设甲组中小球的最小编号为
,最大编号为
;乙组中小球的最小编号为
,最大编号为
记
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af08d7880119cf28597caa5b8bc2318b.png)
(1)当
时,求
的分布列和数学期望;
(2)令
表示“事件
与
的取值恰好相等”.
①求事件
发生的概率
;
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd1cd466cd9c2efac66912e0d4cd188.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbda50272b74d847ec25ee9bf89b48ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37f38b2f8c48333ec2e7749a83fcd0c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af08d7880119cf28597caa5b8bc2318b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c1116ce7f5a1a7b57517276d5092fa.png)
①求事件
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a244cf6ac956323ea14e09c5e175448.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cd2de30ea549eddd97b1a1c81bf092.png)
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解题方法
5 . 投掷一枚硬币(正反等可能),设投掷
次不连续出现三次正面向上的概率为
.
(1)求
,
,
和
;
(2)写出
的递推公式;
(3)单调有界原理:①若数列
单调递增,且存在常数
,恒有
成立,那么这个数列必定有极限,即
存在;②若数列
单调递减,且存在常数
,恒有
成立,那么这个数列必定有极限,即
存在.请根据单调有界原理判断
是否存在?有何统计意义?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee50575e3ebd56c4f46dd0bbf8e55d3.png)
(2)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
(3)单调有界原理:①若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5612ce06759d0f77ca029d10083f7d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed169ec40816590af52f4ff8b1f5ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63cad0f23354aa754ade482d849557fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed169ec40816590af52f4ff8b1f5ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675a2e9584f91900fa08f7808d44dcd7.png)
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6 . 在
中,角A,B,C的对边为a,b,c,已知
,
,
是等差数列.
(1)若a,b,c是等比数列,求
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7167cd55af72b5699802b277c33326.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f7eaffde85b29b76ac40b5981ada36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17497a284ddace3ee09fc81c2302628f.png)
(1)若a,b,c是等比数列,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe7a93172d308a58200e3c722fe1072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6c3e00a78921faf110ffb26d93bb2c.png)
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2卷引用:浙江省(杭州二中、绍兴一中、温州中学、金华一中、衢州二中)五校联考2024届高考数学模拟卷
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7 . 斐波那契数列(Fibonacci sequence),又称黄金分割数列,因数学家莱昂纳多·斐波那契(Leonardo Fibonacci)以兔子繁殖为例子而引入,故又称为“兔子数列”,指的是这样一个数列:1、1、2、3、5、8、13、21、34、…,在数学上,斐波那契数列以如下递推的方式定义:
,
,
(
,
),已知
,则集合A中的元素个数可表示为
,又有
且
.
(1)求集合A中奇数元素的个数,不需说明理由;并求出集合B中所有元素之积为奇数的概率;
(2)求集合B中所有元素之和为奇数的概率.
(3)取其中的6个数1,2,3,5,13,21,任意排列,若任意相邻三数之和都不能被3整除,求这样的排列的个数.(如排列1,2,3,5,13,21中,相邻三数如“1,2,3”(“3,5,13”、“5,13,21”),和能被3整除,则此排列不合题意)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f966272f7781790ff27e40db6b525253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a404164c8d199f60d183a59b3647cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb976cc41026ce1540505e9c5f9e81a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e5ee1d004ae893eb0190b6e9a4c6c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf22d7d1a965bda25168a233fb6290c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3331942d1f39489803a81d76844cc442.png)
(1)求集合A中奇数元素的个数,不需说明理由;并求出集合B中所有元素之积为奇数的概率;
(2)求集合B中所有元素之和为奇数的概率.
(3)取其中的6个数1,2,3,5,13,21,任意排列,若任意相邻三数之和都不能被3整除,求这样的排列的个数.(如排列1,2,3,5,13,21中,相邻三数如“1,2,3”(“3,5,13”、“5,13,21”),和能被3整除,则此排列不合题意)
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8 . 已知集合
,非空集合
.
(1)当
时,求
;
(2)若
是
的必要条件,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da81f9eb69beba3e297f507bc431a826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68996b0e58fc8d2236c285d18e9cda9b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7848c89302a41e9576530313fc3e61b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/653bcf7b627c3b87fcb310732313d9b0.png)
您最近一年使用:0次
名校
9 . 在锐角
中,角
所对的边分别是
.已知
,
.
(1)求角
;
(2)若
是
内的一动点,且满足
,则
是否存在最大值?若存在,请求出最大值及取最大值的条件;若不存在,请说明理由;
(3)若
是
中
上的一点,且满足
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64962ad7ac80b078a676e70bad4ce6e.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b70494b72a951263128f2961992b9c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136cdd691e63a13b934567ddd7642d85.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8245244d6c3a1e703fb7f658defd8277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a732126df5fa76243880cc9e10cc97fd.png)
您最近一年使用:0次
名校
解题方法
10 . 已知
,
,令函数
.
(1)求函数
的表达式及其单调增区间;
(2)将函数
的图象上每个点纵坐标缩短到原来的
,横坐标缩短到原来的
,得到函数
的图象,求函数
在区间
内的所有零点之和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6914d84547cba7ce5acded9cc7114c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/375ce361d39ae10f8e86ba66950e1033.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7aa1233d7a93113281594c41f25c7db.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51004aa0b1927fed42275dc740dc1509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d4e402f43b62a3045d9f0da2e03441.png)
您最近一年使用:0次
2024-05-03更新
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326次组卷
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3卷引用:浙江省北斗联盟2023-2024学年高一下学期4月期中联考数学试题
浙江省北斗联盟2023-2024学年高一下学期4月期中联考数学试题湖北省荆州市荆州中学2023-2024学年高一下学期5月月考数学试卷(已下线)专题07 一轮复习三角函数(2)--高二期末考点大串讲(人教A版2019)