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1、揚州大學(xué)2014級高等數(shù)學(xué)Ⅰ(2)期中考試試題班級 學(xué)號 姓名 得分 一、選擇題(每小題3分,共18分)1.對于二元函數(shù),下列結(jié)論中正確的是( ?。粒羝珜?dǎo)數(shù)與都存在,則必在點處連續(xù)B.若偏導(dǎo)數(shù)與都存在,則必在點處可微C.若與都存在,則必有D.若在點處可微,則在點處沿任一方向的方向?qū)?shù)都存在2.設(shè)函數(shù)的全微分為,則( ?。粒皇菢O值,是極大值 B.不是極值,是極小值C.是極小值,是極大值 ?。模菢O大值,是極小值3.設(shè)函數(shù)由方程確定,其中為可導(dǎo)函數(shù),為常數(shù),則( ). A. ?。拢 。茫 。模?.二次積分交換積分
2、次序后得( ).A. B.C. D.5.二次積分的極坐標(biāo)形式為( ?。畂therstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasb
3、eentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand第5頁 共6頁A. ?。拢茫 。模?.設(shè)函數(shù)滿足,則與依次為( ?。粒 。拢 。茫 。模⒂嬎泐}(每小題7分,共70分)7.設(shè),求,及.8.設(shè)是由方程所確定的函數(shù),求.ot
4、herstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterp
5、risesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand第5頁 共6頁9.設(shè),其中函數(shù)具有二階連續(xù)偏導(dǎo)數(shù),求.10.求曲線在點處的切線方程與法平面方程.11.設(shè)函數(shù),求(1)在點處沿從該到點的方向的方向?qū)?shù);(2)在點處的方向?qū)?shù)的最大值.otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,an
6、dDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCo
7、mmitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand第5頁 共6頁12.求二元函數(shù)的極值.13.在曲面的第一卦限部分上求一點,使這點到坐標(biāo)原點的距離最短.otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirect