最新廣播電視大學(xué)(電大)期末考試【經(jīng)濟數(shù)學(xué)基礎(chǔ)】課程形考作業(yè)試題及答案_第1頁
最新廣播電視大學(xué)(電大)期末考試【經(jīng)濟數(shù)學(xué)基礎(chǔ)】課程形考作業(yè)試題及答案_第2頁
最新廣播電視大學(xué)(電大)期末考試【經(jīng)濟數(shù)學(xué)基礎(chǔ)】課程形考作業(yè)試題及答案_第3頁
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1、2015新年度廣播電視大學(xué)(電大)期末考試【經(jīng)濟數(shù)學(xué)基礎(chǔ)】課程形考作業(yè)試題及答案(一)填空題1.02.設(shè),在處連續(xù),則.答案:13.曲線在的切線方程是 .答案:4.設(shè)函數(shù),則.答案:5.設(shè),則 (二)單項選擇題1. 函數(shù),下列變量為無窮小量是( c ) a b c d 2. 下列極限計算正確的是( b )a. b.c. d.3. 設(shè),則( b ) a b c d4. 若函數(shù)f (x)在點x0處可導(dǎo),則( b )是錯誤的 a函數(shù)f (x)在點x0處有定義 b,但 c函數(shù)f (x)在點x0處連續(xù) d函數(shù)f (x)在點x0處可微 5.若,則 b )a1/ b-1/ c d(三)解答題1計算極限(1)

2、 (2)(3) (4)(5) (6)2設(shè)函數(shù),問:(1)當(dāng)為何值時,在處有極限存在?(2)當(dāng)為何值時,在處連續(xù).答案:(1)當(dāng),任意時,在處有極限存在;(2)當(dāng)時,在處連續(xù)。3計算下列函數(shù)的導(dǎo)數(shù)或微分:(1),求答案:(2),求答案:(3),求答案:(4),求答案:(5),求答案:(6),求答案:(7),求答案:(8),求答案:(9),求答案:(10),求答案:4.下列各方程中是的隱函數(shù),試求或(1),求答案:(2),求答案:5求下列函數(shù)的二階導(dǎo)數(shù):(1),求答案:(2),求及答案:,電大天堂【經(jīng)濟數(shù)學(xué)基礎(chǔ)】形考作業(yè)二答案:(一)填空題1.若,則.答案:2. .答案:3. 若,則 .答案:4.

3、設(shè)函數(shù).答案:05. 若,則.答案:(二)單項選擇題1. 下列函數(shù)中,( d )是xsinx2的原函數(shù) acosx2 b2cosx2 c-2cosx2 d-cosx2 2. 下列等式成立的是( c ) a b c d3. 下列不定積分中,常用分部積分法計算的是(c ) a, b c d4. 下列定積分計算正確的是( d ) a b c d 5. 下列無窮積分中收斂的是( b ) a b c d (三)解答題1.計算下列不定積分(1)答案: (2)答案:(3)答案:(4)答案:(5)答案:(6)答案:(7)答案:(8)答案:2.計算下列定積分(1)答案:(2)答案:(3)答案:2(4)答案:(5

4、)答案:(6)答案:電大天堂【經(jīng)濟數(shù)學(xué)基礎(chǔ)】形考作業(yè)三答案:(一)填空題1.設(shè)矩陣,則的元素.答案:32.設(shè)均為3階矩陣,且,則=. 答案:3. 設(shè)均為階矩陣,則等式成立的充分必要條件是 .答案:4. 設(shè)均為階矩陣,可逆,則矩陣的解.答案:5. 設(shè)矩陣,則.答案:(二)單項選擇題1. 以下結(jié)論或等式正確的是( c ) a若均為零矩陣,則有b若,且,則 c對角矩陣是對稱矩陣 d若,則2. 設(shè)為矩陣,為矩陣,且乘積矩陣有意義,則為( a )矩陣 a b c d 3. 設(shè)均為階可逆矩陣,則下列等式成立的是(c ) a, b c d 4. 下列矩陣可逆的是( a ) a b c d 5. 矩陣的秩是(

5、 b ) a0 b1 c2 d3 三、解答題1計算(1)=(2)(3)=2計算解 =3設(shè)矩陣,求。解 因為所以4設(shè)矩陣,確定的值,使最小。答案:當(dāng)時,達到最小值。5求矩陣的秩。答案:。6求下列矩陣的逆矩陣:(1)答案 (2)a =答案 a-1 = 7設(shè)矩陣,求解矩陣方程答案:x = 四、證明題1試證:若都與可交換,則,也與可交換。提示:證明,2試證:對于任意方陣,是對稱矩陣。提示:證明,3設(shè)均為階對稱矩陣,則對稱的充分必要條件是:。提示:充分性:證明 必要性:證明4設(shè)為階對稱矩陣,為階可逆矩陣,且,證明是對稱矩陣。提示:證明=電大天堂【經(jīng)濟數(shù)學(xué)基礎(chǔ)】形考作業(yè)四答案:(一)填空題1.函數(shù)的定義域

6、為 2. 函數(shù)的駐點是,極值點是 ,它是極 值點.答案:,小3.設(shè)某商品的需求函數(shù)為,則需求彈性 .答案:4.行列式.答案:45. 設(shè)線性方程組,且,則時,方程組有唯一解.答案:(二)單項選擇題1. 下列函數(shù)在指定區(qū)間上單調(diào)增加的是( b) asinx be x cx 2 d3 x2. 設(shè),則( c ) a1/x b1/ x 2 cx dx 2 3. 下列積分計算正確的是( a) a bc d4. 設(shè)線性方程組有無窮多解的充分必要條件是( d )a b c d 5. 設(shè)線性方程組,則方程組有解的充分必要條件是( c ) a b c d三、解答題1求解下列可分離變量的微分方程:(1) 答案:(2

7、)答案:2. 求解下列一階線性微分方程:(1)答案:(2)答案:3.求解下列微分方程的初值問題:(1) ,答案:(2),答案:4.求解下列線性方程組的一般解:(1)答案:(其中是自由未知量)所以,方程的一般解為(其中是自由未知量)(2)答案:(其中是自由未知量)5.當(dāng)為何值時,線性方程組有解,并求一般解。答案: (其中是自由未知量)6為何值時,方程組答案:當(dāng)且時,方程組無解;當(dāng)時,方程組有唯一解;當(dāng)且時,方程組無窮多解。7求解下列經(jīng)濟應(yīng)用問題:(1)設(shè)生產(chǎn)某種產(chǎn)品個單位時的成本函數(shù)為:(萬元),求:當(dāng)時的總成本、平均成本和邊際成本;當(dāng)產(chǎn)量為多少時,平均成本最小?答案:(萬元) (萬元/單位)(

8、萬元/單位)當(dāng)產(chǎn)量為20個單位時可使平均成本達到最低。(2).某廠生產(chǎn)某種產(chǎn)品件時的總成本函數(shù)為(元),單位銷售價格為(元/件),問產(chǎn)量為多少時可使利潤達到最大?最大利潤是多少答案:當(dāng)產(chǎn)量為250個單位時可使利潤達到最大,且最大利潤為(元)。(3)投產(chǎn)某產(chǎn)品的固定成本為36(萬元),且邊際成本為(萬元/百臺)試求產(chǎn)量由4百臺增至6百臺時總成本的增量,及產(chǎn)量為多少時,可使平均成本達到最低解:當(dāng)產(chǎn)量由4百臺增至6百臺時,總成本的增量為答案: 100(萬元) 當(dāng)(百臺)時可使平均成本達到最低.(4)已知某產(chǎn)品的邊際成本=2(元/件),固定成本為0,邊際收益,求: 產(chǎn)量為多少時利潤最大?在最大利潤產(chǎn)量

9、的基礎(chǔ)上再生產(chǎn)50件,利潤將會發(fā)生什么變化?答案:當(dāng)產(chǎn)量為500件時,利潤最大. - 25 (元)即利潤將減少25元. 戀愛運up一緒lets月亭方正!気持今flying get!dou都斗豆逗陡抖痘兜讀蚪竇篼蔸乧侸兠凟剅吺唗投斣枓梪橷毭氀浢瀆瀆瞗窬竇脰艔豆讀逾郖酘酡鈄鋀鈄閗闘阧餖饾斗鬦鬪鬬鬭du讀度毒渡堵獨肚鍍賭睹杜督都犢妒頓蠹篤嘟瀆櫝牘黷髑芏儥凟剢剫匵厾噣土涂妬嬻剬塅媏彖斷毈瑖碫篅籪緞專腶葮褍踹躖鍛鍴mr najib met search crews at pearce raaf base near perth on thursday morning, before their plane

10、s left for the day, and then later held talks with mr abbott.the disappearance of mh370 has tested our collective resolve, he told a news conference.faced with so little evidence, and such a herculean task, investigators from malaysia, the us, the uk, china, australia and france have worked without

11、pausehe thanked both search teams and the australian government for their efforts in recent weeks, and said the search would go on.continue reading the main storymh370 - facts at a glance 8 march:malaysia airlines kuala lumpur-beijing flight carrying 239 people disappears planes transponder, which c

12、ommunicates with ground radar, was switched off as it left malaysian airspace satellite pings indicate plane was still flying seven hours after satellite contact was lost 24 march:based on new calculations, malaysian pm says beyond reasonable doubt that plane crashed in southern indian ocean with no

13、 survivors what we know the search for flight mh370i know that until we find the plane, many families cannot start to grieve. i cannot imagine what they must be going through. but i can promise them that we will not give up, he said.malaysian authorities have come in for heavy criticism over their m

14、anagement of the search, especially from relatives of thweather conditions were fair, with visibility of approximately 10km (6 miles), the joint agency coordination centre (jacc) - which is overseeing the search - said.the british submarine hms tireless is also in the southern indian ocean and is du

15、e to be joined by royal navy ship hms echo.the australian navy ship ocean shield is heading to the region and has equipment for detecting the planes black-box flight recorder.experts say timing is critical as the flight recorder may only have enough battery power to send out a signal until 7 april.a

16、ir chief marshall angus houston, head of the jacc, warned that the search operation faced multiple difficulties.this is one of the most demanding and challenging search and rescue operations, or search and recovery operations, that i have ever seen and i think probably one of the most complex operat

17、ions of this nature that the world has ever seen, he told mr najib and mr abbott.on wednesday malaysian police chief khalid abu bakar said investigators had cleared all passengers of possible involvement in hijacking, sabotage or having personal or psychological problems that could have been connect

18、ed to the disappearance.but he said that the criminal investigation could go on and on and on. we have to clear every little thing.at the end of the investigations, we may not even know the real cause. we may not even know the reason for this incident, he added.the police chief said that more than 1

19、70 interviews had been conducted with family members of the pilots and crew members, and that even cargo and food served on the plane were being investigated in case ofdui對隊堆兌敦鐓碓懟憝兊兌垖埻塠奪奪対對嵟憞懟捶杸濧濻瀢瀩痽磓祋綐膭薱謉譈譵追鈗銳銳錞鎚鐓鐜銳陮隊頧鴭dul乧dun噸頓蹲墩敦鈍盾囤遁不躉沌盹鐓礅燉砘伅俊噸墪壿庉忳敦憞撉撴楯橔潡燉犜獤碷腞腯蜳豚踲蹾躉逇遯鈍鐓鐜頓驐duo多朵奪舵剁垛跺惰墮掇哆馱度躲踱沲咄鐸裰哚綞

20、亸仛兊兌兌凙刴剟剫吋喥嚉嚲垜埵墮墯夛奪奲媠嫷尮崜嶞憜挅挆捶揣敓敚敠敪朶雜杕枤柁柂柮桗棰椯橢毲沰沱澤痥硾綞茤袳詑誃貀趓跢跥跿躱軃鄲鄲鈬錞鍺鐸鍺陀陊隋隋隓飿饳馱駄鬌鮵鵽點e餓哦額鵝蛾扼俄訛阿遏峨娥惡厄鄂鋨諤堊鍔閼萼苊軛婀莪鱷顎腭愕呃噩鶚屙亞亜亞偽佮侉偔偽偽僫匎匼卾吪呝咢咹啞唖啈啊啐啞惡囐囮埡埡堊堨堮妸妿姶娾娿媕屵岋峉峩崿庵廅悪惡戹搕搤搹擜曷枙椏櫮唉歞歹歺洝涐湂玀珴琧痷皒睋砈砐砨砵硆硪磀礘胺蒍蕚蘁蚅蝁覨訛咯誐諤譌讍豟軛軶輵迗遌遻邑鈋鋨鍔鑩閜閼阨阸隘頞頟額顎餓餩騀鬲魤魥鱷鰪鱷鴳鵈鵝鵞鶚齃腭齾青年()、技術(shù)()、戀愛()、翡翠()、読書()、人(,)、幸福()、訓(xùn)讀詞匯:青()、術(shù)()、戀()、好()、

21、読()、人()、幸()、漢字“?!笨梢宰x成“”也可以讀成“”?!啊笔撬囊糇x,“”是它的訓(xùn)讀。“史憲巨”等漢字一般只使用它們的一種音讀,“貝又咲()”一般只使用它們的一種訓(xùn)讀,但這類漢字較少。日語里的漢字通常都有兩三種甚至更多的音訓(xùn)讀發(fā)音。比如“生”,音讀可讀作“”,訓(xùn)讀可讀作“”等。同上面所說的,漢字每個字都有與之對應(yīng)的音讀、訓(xùn)讀,但也有一些比較特殊。比如“梅雨”,它的發(fā)音為“”,不能把每個漢字分別讀什么區(qū)分開來。我們把這類發(fā)音叫做“熟字訓(xùn)”。以下這些也是“熟字訓(xùn)”:田舎() 時雨()相撲(寫作“相撲”,)土產(chǎn)() 為替()紅葉()吹雪() 足袋()日和()蒲公英()en恩摁蒽嗯奀峎煾饐唔eng鞥eo仒eol乻eom欕eos旕er而二耳兒餌爾貳洱珥鮞鴯佴邇鉺侕児兒刵咡唲奶尒尓峏弍弐杒栭栮樲毦洏渪濡爾粫耏聏胹臑荋薾衈袻誀貮貳趰輀輭轜邇鉺陑陾隭餌駬髵髶鮞鴯fa發(fā)法罰伐乏筏閥琺垡砝佱傠姂廢彂拔撥撥栰橃泛沷泛灋琺疺発發(fā)瞂笩罰罸茷蕟藅貶貶醗發(fā)鍅閥髪發(fā)fan反飯翻番犯凡帆返泛繁煩販范樊

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