冯恩信 电磁场与电磁波 课后习题答案

冯恩信 电磁场与电磁波 课后习题答案

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101.20ᵫ@ᑭᵨᙊᳫᙶ᪗QRSᙶ᪗ḄᐵU@VW>---------------——------------------------------------------------OGXx=rsinOcosg

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20先(0A4Ayz()1)^_=\,/5ab5AycAzḄdefᙠ(x,y,z)Ḅhijkr_-SAdA\Adl--4Az-(Aஹ,+--Az)Ay+(A+ߟ-Ay)Az+Aஹ,AyzI&dy=----AzAyH--LA.yAz&dyZdzdy2)^஺=9,/5ab5AxcAzḄdefᙠ(x,y,z)Ḅhijk--dA8AA-dl=-A/ix-(A+—Ar)Az+(A+--Az)Av+AAzxxdxdz■./0+.dxdz1----==---+—2Avdxdz3)^ᔵ=2,/5ab5ArcAyḄdefᙠ(x,y,z)Ḅhijk--dAS4A-dl=+AஹஹAy-(A+--Ay)Ac+(A+-VAr)Ay+A/Sxvyxdydx-A)&+rgdydx\A-di/v+᜜Avdydxtuxu£(+x•+y+ᐶ-{+ᔩ+2(.}+9)dzdydxdzdydx

21<元-z旦g金a441.32Ḅ(:XAAxyzyzadadeaVxF3cdydia@di[Fஹ.[2yz-1=x(-2y)+9(0+0)+z(-x+0)c=-2yx-xz1.33VxV,X7xᐗx(zQ),Vx0(:APP(PZxV112=0Pdpd(pdz.X?00。

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