西交《高等數(shù)學(xué)（專升本）》在線作業(yè)答卷

1、西交高等數(shù)學(xué)（專升本）在線作業(yè)試卷總分:100 得分:100一、單選題 (共 40 道試題,共 80 分)1.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:A2.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:D3.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:D4.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:C5.要用鐵板做一個(gè)體積為2m3的有蓋長方體水箱,問長、寬、高各取怎樣的尺寸時(shí),才能使用料最省?A.均為32m時(shí)，用料最省.B.均為33m時(shí)，用料最省.C.均為3m時(shí)，用料最省.D.均為2m時(shí)，用料最省.本題的正確對(duì)的答案選項(xiàng)是選擇是:A6

2、.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:C7.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:C8.M1(2,3,1)到點(diǎn)M2(2,7,4)的距離M1M2=( ).A.3B.4C.5D.6本題的正確對(duì)的答案選項(xiàng)是選擇是:C9.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:C10.點(diǎn)x=0是函數(shù)y=x4的( ).A.駐點(diǎn)但非極值點(diǎn)B.拐點(diǎn)C.駐點(diǎn)且是拐點(diǎn)D.駐點(diǎn)且是極值點(diǎn)本題的正確對(duì)的答案選項(xiàng)是選擇是:D11.半徑R為的金屬圓片,則面積S的微分dS是( )A.RdRB.2RdRC.dRD.2dR本題的正確對(duì)的答案選項(xiàng)是選擇是:B12.曲線y=ex-e-x

3、的凹區(qū)間是( )A.(-,0)B.(0,+)C.(-,1)D.(-,+)本題的正確對(duì)的答案選項(xiàng)是選擇是:B13.曲線 y=x3+x-2 在點(diǎn)(1,0)處的切線方程是( )A.y=2(x-1)B.y=4(x-1)C.y=4x-1D.y=3(x-1)本題的正確對(duì)的答案選項(xiàng)是選擇是:B14.曲線y=xlnx的平行于直線x-y+1=0的切線方程是( )A.y=xB.y=(lnx-1)(x-1)C.y=x-1D.y=-(x-1)本題的正確對(duì)的答案選項(xiàng)是選擇是:C15.下列各微分式正確的是( ).A.xdx=d(x2)B.cos2x=d(sin2x)C.dx=-d(5-x)D.d(x2)=(dx)2本題的

4、正確對(duì)的答案選項(xiàng)是選擇是:C16.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:C17.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:A18.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:A19.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:B20.已知y=xsin3x ,則dy=( ).A.(-cos3x+3sin3x)dxB.(3xcos3x+sin3x)dxC.(cos3x+3sin3x)dxD.(xcos3x+sin3x)dx本題的正確對(duì)的答案選項(xiàng)是選擇是:B21.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:A22.以下結(jié)論

5、正確的是( ).A.若x0為函數(shù)y=f(x)的駐點(diǎn),則x0必為函數(shù)y=f(x)的極值點(diǎn).B.函數(shù)y=f(x)導(dǎo)數(shù)不存在的點(diǎn),一定不是函數(shù)y=f(x)的極值點(diǎn).C.若函數(shù)y=f(x)在x0處取得極值,且f(x)存在,則必有f(x)=0.D.若函數(shù)y=f(x)在x0處連續(xù),則y=f(x0)一定存在.本題的正確對(duì)的答案選項(xiàng)是選擇是:C23.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:A24.函數(shù)y=ln(1+x2)在區(qū)間-2,-1上的最大值為( )A.4B.0C.1D.ln5本題的正確對(duì)的答案選項(xiàng)是選擇是:D25.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:D26.圖A.

6、AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:A27.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:D28.函數(shù)y=x2*e(-x)及圖象在(1,2)內(nèi)是( ).A.單調(diào)減少且是凸的B.單調(diào)增加且是凸的C.單調(diào)減少且是凹的D.單調(diào)增加且是凹的本題的正確對(duì)的答案選項(xiàng)是選擇是:B29.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:C30.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:D31.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:A32.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:B33.設(shè)函數(shù)y=f(x)在點(diǎn)x0處可導(dǎo)，且

7、f(x)0, 曲線y=f(x)則在點(diǎn)(x0,f(x0)處的切線的傾斜角為 .A.0B./2C.銳角D.鈍角本題的正確對(duì)的答案選項(xiàng)是選擇是:C34.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:B35.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:D36.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:A37.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:D38.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:B39.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:B40.圖A.AB.BC.CD.D本題的正確對(duì)的答案選項(xiàng)是選擇是:A二、判斷題 (共 10 道試題,共 20 分)41.圖本題的正確對(duì)的答案選項(xiàng)是選擇是:錯(cuò)誤42.無窮間斷點(diǎn)就是函數(shù)在該點(diǎn)的極限是無窮。本題的正確對(duì)的答案選項(xiàng)是選擇是:正確43.有限個(gè)無窮小的和仍然是無窮小.本題的正確對(duì)的答案選項(xiàng)是選擇是:正確44.f(x)=0對(duì)應(yīng)的點(diǎn)不一定是曲線的拐點(diǎn)本題的正確對(duì)的答案選項(xiàng)是選擇是:正確45.圖本題的正確對(duì)的答案選項(xiàng)是選擇是:正確46.圖本題的正確對(duì)的答案選項(xiàng)是選擇是:錯(cuò)誤47.圖