电大《工程数学》历年期末试题及参考答案小抄.doc

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1、试卷代号：1080中央广播电视大学20112012学年度第一学期“开放本科”期末考试（半开卷）工程数学(本) 试题一、单项选择题(每小题3分，共15分)1 设，为三阶可逆矩阵，且，则下列（ ）成立A B C D 2 设是n阶方阵，当条件（ ）成立时，n元线性方程组有惟一解AE3设矩阵的特征值为0，2，则的特征值为（ ）。A0，2 B0，6C0，0 D2，64若随机变量，则随机变量 ( )5 对正态总体方差的检验用( )二、填空题(每小题3分，共15分)6 设均为二阶可逆矩阵，则 8 设 A， B 为两个事件，若,则称A与B9若随机变量，则 10若都是的无偏估计，且满足_，则称比更有效。三、计算

2、题(每小题16分，共64分)11 设矩阵，那么可逆吗？若可逆，求逆矩阵12在线性方程组中取何值时，此方程组有解。在有解的情况下，求出通解。13. 设随机变量,求和。 (已知，)14. 某切割机在正常工作时，切割的每段金属棒长服从正态分布，且其平均长度为10.5cm，标准差为0.15cm。从一批产品中随机地抽取4段进行测量，测得的结果如下：（单位：cm）10.4, 10.6, 10.1, 10.4问：该机工作是否正常（）？四、证明题（本题6分）15. 设n阶矩阵A满足,试证A为对称矩阵。参考解答一、单项选择题(每小题3分，共15分) 1、B 2、A 3、B 4、D 5、C 二、填空题(每小题3分

3、，共15分)三、计算题(每小题16分，共64分)试卷代号：1080中央广播电视大学20102011学年度第二学期“开放本科”期末考试（半开卷）工程数学(本) 试题2011年7月一、单项选择题(每小题3分，共15分)1 设，都是n阶方阵，则等式（ ）成立A B C D2 已知2维向量组则至多是 AS（ ）。AE A、1 B、2 C、3 D、43线性方程组解的情况是（ ）。A无解 B有惟一非零解C只有零解 D有无穷多解4对任意两个事件 A，B，等式( )成立A B C D5 设是来自正态总体的样本，则 ( ) 是统计量A B C D二、填空题(每小题3分，共15分)1 设A,B是3阶方阵，其中则2

4、 设A为n阶方阵，若存在数和非零n维向量，使得，则称为A的_。3 若，则 4设随机变量，若,则 5若参数的两个无偏估计量和满足，则称比更_三、计算题(每小题16分，共64分)1 设矩阵，,求2设齐次线性方程组，为何值时，方程组有非零解？在有非零解时求其通解。3. 设,求(1)；（2）。4. 某钢厂生产了一批管材，每根标准直径100mm，今对这批管材进行检验，随机取出9根测得直径的平均值为99.9mm，样本标准差s=0.47，已知管材直径服从正态分布，问这批管材的质量是否合格？（检验显著性水平）四、证明题（本题6分）设A是可逆的对称矩阵，试证：也是对称矩阵。参考答案一、单项选择题(每小题3分，共

5、15分) 1、C 2、B 3、A 4、D 5、B 二、填空题(每小题3分，共15分)1122特征值30.343 5. 有效三、计算题(每小题16分，共64分)四、证明题（本题6分）试卷代号：1080中央广播电视大学20102011学年度第一学期“开放本科”期末考试（半开卷）工程数学(本) 试题2011年1月一、单项选择题(每小题3分，共15分)1 设，都是n阶方阵，则下列等式成立的是（ ）A B C D 2 方程组相容的充分必要条件是 AS（ ），其中AE3下列命题中不正确的是（ ）。A有相同的特征多项式 B若是 A 的特征值，则的非零解向量必是 A 对应于的特征向量C若是A的一个特征值，则A

6、X=O 必有非零解 DA 的特征向量的线性组合仍为 A 的特征向量4若事件 A 与 B 互斥，则下列等式中正确的是( )5 设是来自正态总体的样本，则检验假设采用统计量 ( )二、填空题(每小题3分，共15分)6 设，则的根是7设4 元钱性方程提 AX=B 有解且，那么的相应齐次方程程的基础解系含有_个解向量。8 设 A， B 互不相容，且 P(A)O ，则 9设随机变量，则 10若样本来自总体，且，则_三、计算题(每小题16分，共64分)11 设矩阵，求12求下列线性方程组的通解。13. 设随机变量,试求(1)；（2）使成立的常数。 (已知，)14. 从正态总体中抽取容量为625的样本，计算

7、样本均值得，求的置信区间度为，99%的置信区间。（已知）四、证明题（本题6分）15. 设n阶矩阵A满足,则A为可逆矩阵。参考解答一、单项选择题(每小题3分，共15分) 1、A 2、B 3、D 4、A 5、C 二、填空题(每小题3分，共15分)11,-1,2.,-223304np 5.三、计算题(每小题16分，共64分)试卷代号：1080中央广播电视大学20092010学年度第二学期“开放本科”期末考试（半开卷）工程数学(本) 试题2010年7月一、单项选择题(每小题3分，共15分)1 设，B都是n阶方阵，则下列命题正确的是（ ）A B C D 2 向量组的秩是 AS（ ）AEA1 B3C 2

8、D43 n元线性方程组，有解的充分必要条件是（ ）。A BA不是行满秩矩阵C D4 袋中有3个红球，2个白球，第一次取出一球后放回，第二次再取一球，则两球都是红球的概率是 ( )A B C D 5 设是来自正态总体的样本，则 ( )是无偏估计A BC D二、填空题(每小题3分，共15分)1 设均为3阶方阵，且2设为阶方阵，若存在数和非零维向量，使得_，则称为的特征值3设随机变量，则4设为随机变量，已知，此时 5设是未知参数的一个无偏估计量，则有_三、计算题(每小题16分，共64分)1 设矩阵，且有，求2求线性方程组的全部解。3. 设,试求（1）；（2）。 (已知，)4. 据资料分析，某厂生产的

9、一批砖，其抗断强度，今从这批砖中随机地抽取了9块，测得抗断强度（单位：）的平均值为31.12，问这批砖的抗断强度是否合格？四、证明题（本题6分） 设是n阶对称矩阵，试证：也是对称矩阵。参考解答一、单项选择题(每小题3分，共15分) 1、A 2、B 3、A 4、D 5、C 二、填空题(每小题3分，共15分)1-18230.3427 5.三、计算题(每小题16分，共64分)1解：利用初等行变换得2解：将方程组的增广矩阵化为阶梯形试卷代号：1080中央广播电视大学20092010学年度第一学期“开放本科”期末考试（半开卷）工程数学(本) 试题2010年1月一、单项选择题(每小题3分，共15分)1 设

10、为对称矩阵，则条件（ ）成立A B C D 2 AS（ ）AEA BC D3 若 ( )成立，则元方程组有唯一解。A BC D的行向量组线性无关4 若条件 ( )成立，则随机事件互为对立事件A B C D 5 对来自正态总体的一组样本，记，则下列各式中 ( )不是统计量ABCD二、填空题(每小题3分，共15分)6 设均为3阶方阵，且7设为阶方阵，若存在数和非零维向量，使得_，则称为相应于特征值的特征向量8若，则9如果随机变量的期望且，那么 10不含未知参数的样本函数称为_三、计算题(每小题16分，共32分)11 设矩阵，求12当取何值时，线性方程组有解，在有解的情况下求出此方程组的一般解四、计

11、算分析题（每小题16分，共32分）13. 设,试求（1）；（2）。 (已知，)14. 某车间生产滚珠，已知滚珠直径服从正态分布，今从一批产品里随机取出9 个，测得直径平均值为15.1 mm，若已知这批滚珠直径的方差为，试找出滚珠直径均值的置信度为0.95的置信区间五、证明题（本题6分）15. 设随机事件相互独立，试证：也相互独立。参考解答一、单项选择题(每小题3分，共15分) 1、B 2、D 3、A 4、C 5、C 二、填空题(每小题3分，共15分)68780.3920 10统计量三、计算题(每小题16分，共64分)11解：利用初等行变换得12解：将方程组的增广矩阵化为阶梯形四、计算分析题（每

12、小题16分，共32分）请您删除一下内容，O(_)O谢谢！【Chinas 10 must-see animations】The Chinese animation industry has seen considerable growth in the last several years. It went through a golden age in the late 1970s and 1980s when successively brilliant animation work was produced. Here are 10 must-see classics from China

13、s animation outpouring that are not to be missed. Lets recall these colorful images that brought the country great joy. Calabash Brothers Calabash Brothers (Chinese: 葫芦娃) is a Chinese animation TV series produced byShanghaiAnimationFilmStudio. In the 1980s the series was one of the most popular anim

14、ations in China. It was released at a point when the Chinese animation industry was in a relatively downed state compared to the rest of the international community. Still, the series was translated into 7 different languages. The episodes were produced with a vast amount of paper-cut animations. Bl

15、ack Cat Detective Black Cat Detective (Chinese: 黑猫警长) is a Chinese animation television series produced by the Shanghai Animation Film Studio. It is sometimes known as Mr. Black. The series was originally aired from 1984 to 1987. In June 2006, a rebroadcasting of the original series was announced. C

16、ritics bemoan the series violence, and lack of suitability for childrens education. Proponents of the show claim that it is merely for entertainment. Effendi Effendi, meaning sir andteacher in Turkish, is the respectful name for people who own wisdom and knowledge. The heros real name was Nasreddin.

17、 He was wise and witty and, more importantly, he had the courage to resist the exploitation of noblemen. He was also full of compassion and tried his best to help poor people. Adventure of Shuke and Beita【舒克与贝塔】 Adventure of Shuke and Beita (Chinese: 舒克和贝塔) is a classic animation by Zheng Yuanjie, w

18、ho is known as King of Fairy Tales in China. Shuke and Beita are two mice who dont want to steal food like other mice. Shuke became a pilot and Beita became a tank driver, and the pair met accidentally and became good friends. Then they befriended a boy named Pipilu. With the help of PiPilu, they co

19、-founded an airline named Shuke Beita Airlines to help other animals. Although there are only 13 episodes in this series, the content is very compact and attractive. The animation shows the preciousness of friendship and how people should be brave when facing difficulties. Even adults recalling this

20、 animation today can still feel touched by some scenes. Secrets of the Heavenly Book Secrets of the Heavenly Book, (Chinese: 天书奇谈)also referred to as Legend of the Sealed Book or Tales about the Heavenly Book, was released in 1983. The film was produced with rigorous dubbing and fluid combination of

21、 music and vivid animations. The story is based on the classic literature Ping Yao Zhuan, meaning The Suppression of the Demons by Feng Menglong. Yuangong, the deacon, opened the shrine and exposed the holy book to the human world. He carved the books contents on the stone wall of a white cloud cave

22、 in the mountains. He was then punished with guarding the book for life by the jade emperor for breaking heavens law. In order to pass this holy book to human beings, he would have to get by the antagonist fox. The whole animation is characterized by charming Chinesepainting, including pavilions, an

23、cient architecture, rippling streams and crowded markets, which fully demonstrate the unique beauty of Chinas natural scenery. Pleasant Goat and Big Big Wolf【喜洋洋与灰太狼】 Pleasant Goat and Big Big Wolf (Chinese:喜羊羊与灰太狼) is a Chinese animated television series. The show is about a group of goats living o

24、n the Green Pasture, and the story revolves around a clumsy wolf who wants to eat them. It is a popular domestic animation series and has been adapted intomovies. Nezha Conquers the Dragon King（Chinese: 哪吒闹海）is an outstanding animation issued by the Ministry of Culture in 1979 and is based on an epi

25、sode from the Chinese mythological novel Fengshen Yanyi. A mother gave birth to a ball of flesh shaped like a lotus bud. The father, Li Jing, chopped open the ball, and beautiful boy, Nezha, sprung out. One day, when Nezha was seven years old, he went to the nearby seashore for a swim and killed the

26、 third son of the Dragon King who was persecuting local residents. The story primarily revolves around the Dragon Kings feud with Nezha over his sons death. Through bravery and wit, Nezha finally broke into the underwater palace and successfully defeated him. The film shows various kinds of attracti

27、ve sceneries and the traditional culture of China, such as spectacular mountains, elegant sea waves and exquisite ancient Chinese clothes. It has received a variety of awards. Havoc in Heaven The story of Havoc in Heaven（Chinese: 大闹天宫）is based on the earliest chapters of the classic storyJourney to

28、the West. The main character is Sun Wukong, aka the Monkey King, who rebels against the Jade Emperor of heaven. The stylized animation and drums and percussion accompaniment used in this film are heavily influenced byBeijingOpera traditions. The name of the movie became a colloquialism in the Chines

29、e language to describe someone making a mess. Regardless that it was an animated film, it still became one of the most influential films in all of Asia. Countless cartoon adaptations that followed have reused the same classic story Journey to the West, yet many consider this 1964 iteration to be the

30、 most original, fitting and memorable, The Golden Monkey Defeats a Demon【金猴降妖】 The Golden Monkey Defeats a Demon (Chinese: 金猴降妖), also referred as The Monkey King Conquers the Demon, is adapted from chapters of the Chinese classics Journey to the West, or Monkey in the Western world. The five-episod

31、e animation series tells the story of Monkey King Sun Wukong, who followed Monk Xuan Zangs trip to the West to take the Buddhistic sutra. They met a white bone evil, and the evil transformed human appearances three times to seduce the monk. Twice Monkey King recognized it and brought it down. The mo

32、nk was unable to recognize the monster and expelled Sun Wukong. Xuan Zang was then captured by the monster. Fortunately Bajie, another apprentice of Xuan Zang, escaped and persuaded the Monkey King to come rescue the monk. Finally, Sun kills the evil and saves Xuan Zang. The outstanding animation ha

33、s received a variety of awards, including the 6th Hundred Flowers Festival Award and the Chicago International Childrens Film Festival Award in 1989. McDull【麦兜】 McDull is a cartoon pig character that was created inHong Kongby Alice Mak and Brian Tse. Although McDull made his first appearances as a s

34、upporting character in the McMug comics, McDull has since become a central character in his own right, attracting a huge following in Hong Kong. The first McDull movie McMug Story My Life as McDull documented his life and the relationship between him and his mother.The McMug Story My Life as McDull is also being translated into French and shown in France. In this version, Mak Bing is the mother of McDull, not his father. 第 22 页 共 22 页