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1、数学分析选论习题选第十章.多元函数微分学1 试论下列函数在指定点的重极限,累次极限(1)22222)(),(yxyxyxyxf,)0,0(),(00yx;(2),1sin1sin)(),(yxyxyxf)0,0(),(00yx.解(1)注意到0),(lim0yxfy)0(x,0),(lim0yxfx)0(y,故两个累次极限均为0,但是,1)1,1(limnnfn,0)1,1(l i mnnfn所以重极限不存在.(2)注意到0),1(ynf,yyynf1sin),)14(2()(n,故两个累次极限不存在.此外,因为|),(|0yxyxf,所以0),(lim)0,0(),(yxfyx.2 设).0
2、,0(),(,0)0,0(),(,),(2222yxyxyxyxxyyxf证明:0),(lim)0,0(),(yxfyx.证明对,0由于|,|21|21|0),(|22222222yxyxyxyxxyyxf可知当2022yx时,便有|0),(|yxf.故0),(lim)0,0(),(yxfyx.3 设242),(yxyxyxf证明:),(lim)0,0(),(yxfyx不存在.证明注意到242420(,)(0,0),()lim(,)lim(1)1xx yymxmxmf x ymxm,它随m而异,因此),(lim)0,0(),(yxfyx不存在.4 讨论下列函数的连续性(1))0,0(),(,0
3、),0,0(),(,)sin(),(22yxyxyxxyyxf精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 1 页,共 15 页(2))0,0(),(,0),0,0(),(,2),(22yxyxyxxyyxf解(1)注意到22|2yxxy,有|2|sin|2|sin|),(|xyxyxyxyxyyxf因此,)0,0(0),(lim)0,0(),(fyxfyx,即),(yxf在(0,0)处连续.(2)注意到,1)1,1(limnnfn54)1,2(l i mnnfn,故),(yxf在(0,0)处不连续.5 讨论函数0,00,1),(222222)(22yxyxyxeyxfyx
4、x在点)0,0(处的偏导数的存在性.解由定义知:11lim0)0,0()0,(lim)0,0(3003xexfxffxxxx,300(0,)(0,0)0(0,0)limlim00yyyfyffyy.6 试讨论函数0,0,0,),(2222122yxyxeyxfyx在)0,0(处的可微性.解.因为,0lim)0,0()0,(lim)0,0(2/1100 xxxxexxfxff,0lim)0,0(),0(lim)0,0(2/1100yyyyeyyfyff所以,),()0,0(),(22)/(122yxyxefyxfyx,其中0),(222/122)/(1eyxeyxyx,0,,22yx由此知),(
5、yxf在)0,0(处可微.7 设)ln(2vuz,而2yxeu,yxv2.求xz,yz.和dz解.由于2yxexu,22yxyeyu,xxv2,1yv,于是)(222xuevuxvvzxuuzxzyx,精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 2 页,共 15 页文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10
6、A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A1
7、0A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A
8、10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10
9、A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q1
10、0A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q
11、10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5
12、Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2文档编码:CR9R6N9P7J10 HS5Q10A10A6X8 ZN8Q9J2X7S2)14(122yxuyevuyvvzyuuzyz.dyyzdxxzdzdxxuevuyx)(222dyuyevuyx)14(122.8 设2)()(yxydydxayx是某可微函数的全微分,求a的值.解 不妨设该可微函数为),(yxfz,则按定义可得2)(yxayxxz,2)(yxyyz,由此知)(|ln)()(2xgyxxyxxgdyyxyz.从而又得)()(2)()(122xg
13、yxyxxgyxyyxxz.联系到上面第一式,有)()(2)(22xgyxyxyxayx或yyxayxyxyxayxxg222)(2)(2)()(,从而2a.9 设),(yxxfz.求22xz,yxz2.解这里z是以x和y为自变量的复合函数,它可写成如下形式),(vufz,xu,yxv.由复合函数求导法则知vfyufxvvfxuufxz1.于是1)1(22222222xvvfxuuvfyxvvufxuufvfyufxxz22222212vfyvufyuf,)1(2vfyufyyxz精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 3 页,共 15 页文档编码:CA4I7M10P
14、7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO
15、9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z
16、4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP
17、3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4
18、E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档
19、编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4
20、I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2112222222yvvfyuuvfyvfyyvvufyuuf.1222322vfyvfyxvufyx10 设在2R上可微函数),(yxf满足xf x+0yf y,试证:在极坐标系里f只是的函数.
21、证 对于复合函数),(yxfuc o srx,sinry,由于sincosyxffru,s i nc o srfrfruryx=xf x+0yf y,因此当0r时,0ru,)sin,cos(rrxrfu与r无关,即在极坐标系里f只是的函数.第十一章.隐函数1 设),(yxzz是由方程yzzxln,求dz.解 方程两边对x求偏导,有xzyzyxzzxz112,因而xzzxz.方程两边对y求偏导,有221yzyzyzyyzzx,因而yxzzyz2.故dyyxzzdxxzzdz2.2 设002222vuxyuvyx,求xvxu,.解方程组两边对x求偏导得到02202xxxxvvuuyuvvux,因此
22、有2224vuyuxvvx,2224vuyvxuux。方程组两边对y求偏导得到02202yyyyvvuuxuvvuy,因此222224,24vuxvyuvvuxuyvuyy.精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 4 页,共 15 页文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档
23、编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4
24、I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P
25、7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO
26、9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z
27、4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP
28、3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4
29、E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J23 设),(yxzz由方程333axyzz所确定,试求)(22xyzyxz.解 对原方程两端对x求导,可得xyzyzxz2,从而知3222242222)()2()/()12()(xyzyxxyzzzxyzyzxyzyzyzxyzyxz.4 设),(yxzz由方程zxyz所确定,试求22xz.解 对原方程取对数,得yzzxlnln,并该式两端对x求导,有xzyxzzxzlnln,即xyzzzxzlnln,再对上式两端对x求导,得)1)(ln(ln)(lnln()ln(1222xzyzzxzxzzxyzxy
30、zxz2)1(ln)2ln(lnzxzzz.5 证明:方程0)/,/(xzyyzxF所确定的隐函数),(yxzz满足xyzyzyxzx.证明对方程0)/,/(xzyyzxF两边分别对x和y求偏导数,有0)1()11(221xzxzxFxzyF,.0)11()1(221yzxFyzyzyF分别解得21122)(yFxFFxzFyxzx,21122)(yFxFFyzFyyzy,于是,得到.)()(211212122xyzyFxFFyzFxFxzFyyzyxzx6 试求椭球面1222222czbyax内接最大长方体的体积.解 易知,此内接长方体的六个面必分别平行于坐标平面。设此内接最大长方体在第一象
31、限中的坐标为),(zyx,由对称性可知该长方体的体积为xyz8,从而问题转化为求函数xyzzyxf8),(在条件精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 5 页,共 15 页文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3
32、N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E
33、5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编
34、码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I
35、7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7
36、M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9
37、P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4
38、S9 ZP3N10G4E5J21222222czbyax下 的 最 值 问 题。设 辅 助 函 数 为)1(),(222222czbyaxx y zzyxF,0,0,0zyx,则有,020202222zyxczxyFbyxzFaxyzF1222222czbyax.从中可得出唯一解30ax,30by,30cz。根据几何性质不难推知,该椭球面之内接长方体在第一象限的顶点为)3,3,3(cba时达到最大体积.3383338abccbaV7 求表面积为2a,而体积最大的长方体的体积.解 设长,宽,高分别为zyx,,则问题变为求函数)0,0,0(zyxxyzV的最大值,联系方程为022axzyzxy.设
39、辅助函数为22,axzyzxyxyzzyx,则有22202202202220 xyzyzyzxzxzxyyxxyyzxza解方程组得到6azyx,因而最大体积为663aV.8 求空间曲线ttxsi n,1cosyt,4sin2tz,在点0p(对应于2t)处的切线方程和法平面方程.解将2t代人参数方程,得点0p)22,1,12(,该曲线的切向量为T=()2,1,1()2(),2(),2(zyx,精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 6 页,共 15 页文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8
40、 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6
41、B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9
42、 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N1
43、0G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J
44、2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:
45、CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M
46、10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2于是得切线方程为22211112zyx法平面方程为1(1)1(1)2(2)2xyz=0,即.4222yx9 求椭圆面632222zyx在)1,1,1(处的切平面方程与法线方程.解设632),(222zyxzyxF.由于2,4,6xyzFx Fy Fz在全空间上处处连续,在)1,1,1(
47、处,2xF,4yF,6zF于是,得切平面方程为0)1(6)1(4)1(2zyx,即632zyx.法线方程为312111zyx.第十三章.重积分1 设D是由直线,0 x,1y和xy围成,试求dxdyexIyD22的值.解 先对x积分后对y积分10302102231dyeydxexdyIyyy.由分部积分法,知eI3161.2 设D是由矩形区域1|x,20y围成,试求dxdyxyID|2的值.解由于22222,|xyyxxyxyxy则dyxydxdyyxdxdxdyxyIxxD22100210222|t d tdxxdxx4/042/3102310cos3861)2(3232465)831(413
48、8613 设D=02,1,0:),(2222xyxyxyyx,试求dxdyxyID的值.精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 7 页,共 15 页文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编
49、码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I
50、7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7M8 HO9P6B2Z4S9 ZP3N10G4E5J2文档编码:CA4I7M10P7