数学分析数学分析PPT (10).pdf

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10、x yU x yCxy?F2222101arctanln()2xydxxyydyCxyCxxyx?FF?12.?kjiaxyzyxzxzyxyzzyx)2()2()2(?5?kjiazyxaaa?xazxyyzazazyxxyazxyzII?IIII?II)(2,)(222?yayxzzxaxyII?II)(22?a(,)UU x y z?(2)(2)(2)dUxyz yzdxxyz zxdyxyz xydz?)()(2222zxdyxdzzdxyydzzdyxyzdx?)(22xydzxdyydxz?)()()()(222zyxxyzdxyzdzxydyzxd?(,)(,)()V x y z

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