北语网院平台18春《高等数学（下）》作业_1含答案资料

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【北语网院】18春《高等数学（下）》作业_1（100分)
【北京语言大学】18春《高等数学（下）》作业_1
北语网院作业答案

试卷总分100得分100
第1题二重积分&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image414.gif&quotwidth=&quot80&quotheight=&quot39&quot/&gt&lt/sub&gt（），D为&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image412.gif&quotwidth=&quot167&quotheight=&quot21&quot/&gt&lt/sub&gt所围成的矩形区域。
A、&ltspan&gt0&lt/span&gt
B、&ltspan&gt1&lt/span&gt
C、&ltspan&gt1&lt/span&gt
D、&ltspan&gt2&lt/span&gt
第2题&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/eblcuimage/3742.BMP&quot/&gt
A、[A]
B、[B]
C、[C]
D、[D]
第3题&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image034.gif&quotwidth=&quot95&quotheight=&quot24&quot/&gt&lt/sub&gt的通解为（）
A、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image036.gif&quotwidth=&quot76&quotheight=&quot21&quot/&gt&lt/sub&gt&lt/span&gt
B、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image038.gif&quotwidth=&quot88&quotheight=&quot21&quot/&gt&lt/sub&gt&lt/span&gt
C、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image040.gif&quotwidth=&quot96&quotheight=&quot21&quot/&gt&lt/sub&gt&lt/span&gt
D、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image042.gif&quotwidth=&quot96&quotheight=&quot21&quot/&gt&lt/sub&gt&lt/span&gt
第4题设&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image266.gif&quotwidth=&quot117&quotheight=&quot24&quot/&gt&lt/sub&gt，则&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image268.gif&quotwidth=&quot49&quotheight=&quot47&quot/&gt&lt/sub&gt（）
A、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image270.gif&quotwidth=&quot13&quotheight=&quot19&quot/&gt&lt/sub&gt&lt/span&gt
B、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image272.gif&quotwidth=&quot12&quotheight=&quot19&quot/&gt&lt/sub&gt&lt/span&gt
C、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image274.gif&quotwidth=&quot21&quotheight=&quot19&quot/&gt&lt/sub&gt&lt/span&gt
D、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image098.gif&quotwidth=&quot13&quotheight=&quot17&quot/&gt&lt/sub&gt&lt/span&gt
第5题&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/eblcuimage/3773.jpg&quot/&gt
A、[A]
B、[B]
C、[C]
D、[D]
第6题&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/eblcuimage/3727.GIF&quot/&gt
A、[A]
B、[B]
C、[C]
D、[D]
第7题设&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image158.gif&quotwidth=&quot159&quotheight=&quot24&quot/&gt&lt/sub&gt则&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image160.gif&quotwidth=&quot61&quotheight=&quot24&quot/&gt&lt/sub&gt（）
A、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image094.gif&quotwidth=&quot9&quotheight=&quot17&quot/&gt&lt/sub&gt&lt/span&gt
B、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image096.gif&quotwidth=&quot21&quotheight=&quot17&quot/&gt&lt/sub&gt&lt/span&gt
C、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image098.gif&quotwidth=&quot13&quotheight=&quot17&quot/&gt&lt/sub&gt&lt/span&gt
D、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image100.gif&quotwidth=&quot25&quotheight=&quot17&quot/&gt&lt/sub&gt&lt/span&gt
第8题若&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image330.gif&quotwidth=&quot45&quotheight=&quot24&quot/&gt&lt/sub&gt，则&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image332.gif&quotwidth=&quot55&quotheight=&quot48&quot/&gt&lt/sub&gt（）
A、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image334.gif&quotwidth=&quot12&quotheight=&quot15&quot/&gt&lt/sub&gt&lt/span&gt
B、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image327.gif&quotwidth=&quot16&quotheight=&quot13&quot/&gt&lt/sub&gt&lt/span&gt
C、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image325.gif&quotwidth=&quot16&quotheight=&quot41&quot/&gt&lt/sub&gt&lt/span&gt
D、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image338.gif&quotwidth=&quot28&quotheight=&quot41&quot/&gt&lt/sub&gt&lt/span&gt
第9题级数&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image496.gif&quotwidth=&quot77&quotheight=&quot47&quot/&gt&lt/sub&gt的收敛域为（）
A、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image498.gif&quotwidth=&quot36&quotheight=&quot21&quot/&gt&lt/sub&gt&lt/span&gt
B、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image500.gif&quotwidth=&quot37&quotheight=&quot21&quot/&gt&lt/sub&gt&lt/span&gt
C、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image502.gif&quotwidth=&quot37&quotheight=&quot21&quot/&gt&lt/sub&gt&lt/span&gt
D、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image504.gif&quotwidth=&quot36&quotheight=&quot21&quot/&gt&lt/sub&gt&lt/span&gt
第10题函数&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image074.gif&quotwidth=&quot103&quotheight=&quot21&quot/&gt&lt/sub&gt的全微分为（）
A、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image076.gif&quotwidth=&quot251&quotheight=&quot23&quot/&gt&lt/sub&gt&lt/span&gt
B、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image078.gif&quotwidth=&quot206&quotheight=&quot24&quot/&gt&lt/sub&gt&lt/span&gt
C、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image080.gif&quotwidth=&quot367&quotheight=&quot24&quot/&gt&lt/sub&gt&lt/span&gt
D、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image082.gif&quotwidth=&quot165&quotheight=&quot22&quot/&gt&lt/sub&gt&lt/span&gt
第11题如果&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image311.gif&quotwidth=&quot52&quotheight=&quot21&quot/&gt&lt/sub&gt具有二阶连续偏导数，则&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image313.gif&quotwidth=&quot83&quotheight=&quot47&quot/&gt&lt/sub&gt（）
A、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image315.gif&quotwidth=&quot69&quotheight=&quot44&quot/&gt&lt/sub&gt&lt/span&gt
B、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image317.gif&quotwidth=&quot69&quotheight=&quot44&quot/&gt&lt/sub&gt&lt/span&gt
C、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image319.gif&quotwidth=&quot69&quotheight=&quot47&quot/&gt&lt/sub&gt&lt/span&gt
D、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image321.gif&quotwidth=&quot69&quotheight=&quot47&quot/&gt&lt/sub&gt&lt/span&gt
第12题两个非零矢量&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image055.gif&quotwidth=&quot13&quotheight=&quot19&quot/&gt与&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image056.gif&quotwidth=&quot15&quotheight=&quot23&quot/&gt相互垂直的充要条件是（）
A、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image058.gif&quotwidth=&quot57&quotheight=&quot19&quot/&gt&lt/sub&gt&lt/span&gt
B、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image060.gif&quotwidth=&quot53&quotheight=&quot19&quot/&gt&lt/sub&gt&lt/span&gt
C、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image062.gif&quotwidth=&quot49&quotheight=&quot19&quot/&gt&lt/sub&gt&lt/span&gt
D、&ltspan&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image064.gif&quotwidth=&quot54&quotheight=&quot19&quot/&gt&lt/sub&gt&lt/span&gt
第13题&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/eblcuimage/3770.GIF&quot/&gt
A、[A]
B、[B]
C、[C]
D、[D]
第14题&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/eblcuimage/3733.jpg&quot/&gt
A、[A]
B、[B]
C、[C]
D、[D]
第15题&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image416.gif&quotwidth=&quot53&quotheight=&quot27&quot/&gt&lt/sub&gt在平面闭区域D上有界是二重积分&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image418.gif&quotwidth=&quot101&quotheight=&quot39&quot/&gt&lt/sub&gt存在的（）
A、&ltspan&gt必要条件&lt/span&gt
B、&ltspan&gt充分条件&lt/span&gt
C、&ltspan&gt充要条件&lt/span&gt
D、&ltspan&gt无关条件&lt/span&gt
第16题若级数&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image646.gif&quotwidth=&quot40&quotheight=&quot45&quot/&gt&lt/sub&gt收敛，则&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image648.gif&quotwidth=&quot75&quotheight=&quot29&quot/&gt&lt/sub&gt。
√、对
、错
正确答案√
第17题设&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image580.gif&quotwidth=&quot85&quotheight=&quot24&quot/&gt&lt/sub&gt，则&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image582.gif&quotwidth=&quot83&quotheight=&quot44&quot/&gt&lt/sub&gt。
√、对
、错
正确答案
第18题函数&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image668.gif&quotwidth=&quot181&quotheight=&quot24&quot/&gt&lt/sub&gt有极小值。
√、对
、错
正确答案
第19题函数&ltem&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image723.gif&quotwidth=&quot92&quotheight=&quot24&quot/&gt&lt/sub&gt&lt/em&gt的全微分&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image725.gif&quotwidth=&quot33&quotheight=&quot19&quot/&gt&lti&gt&lt/i&gt&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image727.gif&quotwidth=&quot108&quotheight=&quot24&quot/&gt&lt/sub&gt。
√、对
、错
正确答案
第20题设&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image693.gif&quotwidth=&quot77&quotheight=&quot21&quot/&gt&lt/sub&gt，则一定有&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image715.gif&quotwidth=&quot88&quotheight=&quot47&quot/&gt&lt/sub&gt成立。
√、对    奥鹏易百

、错
正确答案
第21题设&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image378.gif&quotwidth=&quot75&quotheight=&quot21&quot/&gt&lt/sub&gt在点&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image657.gif&quotwidth=&quot51&quotheight=&quot24&quot/&gt&lt/sub&gt处可微，则&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image378.gif&quotwidth=&quot75&quotheight=&quot21&quot/&gt&lt/sub&gt在点&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image657.gif&quotwidth=&quot51&quotheight=&quot24&quot/&gt&lt/sub&gt必定连续。
√、对
、错
正确答案√
第22题设函数&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image104.gif&quotwidth=&quot51&quotheight=&quot21&quot/&gt&lt/sub&gt在点&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image641.gif&quotwidth=&quot53&quotheight=&quot24&quot/&gt&lt/sub&gt处的偏导数&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image643.gif&quotwidth=&quot49&quotheight=&quot44&quot/&gt&lt/sub&gt都存在，则&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image104.gif&quotwidth=&quot51&quotheight=&quot21&quot/&gt&lt/sub&gt在该点处可微。
√、对
、错
正确答案
第23题&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image705.gif&quotwidth=&quot57&quotheight=&quot24&quot/&gt&lt/sub&gt在点&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image264.gif&quotwidth=&quot32&quotheight=&quot21&quot/&gt&lt/sub&gt处，当&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image708.gif&quotwidth=&quot65&quotheight=&quot19&quot/&gt&lt/sub&gt，&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image710.gif&quotwidth=&quot73&quotheight=&quot21&quot/&gt&lt/sub&gt时的全微分是&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image712.gif&quotwidth=&quot33&quotheight=&quot19&quot/&gt&lt/sub&gt。
√、对
、错
正确答案√
第24题常微分方程都是一阶的。
√、对
、错
正确答案
第25题若函数&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image584.gif&quotwidth=&quot76&quotheight=&quot21&quot/&gt&lt/sub&gt在&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image586.gif&quotwidth=&quot64&quotheight=&quot24&quot/&gt&lt/sub&gt处的两个偏导数&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image600.gif&quotwidth=&quot69&quotheight=&quot24&quot/&gt&lt/sub&gt与&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image602.gif&quotwidth=&quot65&quotheight=&quot25&quot/&gt&lt/sub&gt均存在，则该函数在&ltsub&gt&ltimgsrc=&quothttp//otsstatic.chinaedu.net/ots/blcu/quesimages/e0/25/52ae8b227d744fb3af0681b3837ce025/xia.files/image164.gif&quotwidth=&quot16&quotheight=&quot17&quot/&gt&lt/sub&gt点处一定连续。
√、对
、错
正确答案

奥鹏易百