Answer to Question #257390 in Calculus for Smit

Question #257390
(i) Calculate divergence A = x²zî - 2y³z²ĵ+ xy²zk at the point (1,-1,1).
1
Expert's answer
2021-10-27T15:36:34-0400
Axx=2xz,Ayy=6y2z2,Azz=xy2\dfrac{\partial A_x}{\partial x}=2xz, \dfrac{\partial A_y}{\partial y}=-6y^2z^2,\dfrac{\partial A_z}{\partial z}=xy^2

divA=2xz6y2z2+xy2divA=2xz-6y^2z^2+xy^2

divA(1,1,1)=2(1)(1)6(1)2(1)2+1(1)2divA|_{(1,-1,1)}=2(1)(1)-6(-1)^2(1)^2+1(-1)^2

=3=-3


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