Answer to Question #210672 in Electricity and Magnetism for Ali

Question #210672

1) If a scalar field φ(x,y,z)=3x2y-y3z2, calculate the gradient ∇φ at point M(1,-2,1).


1
Expert's answer
2021-06-29T08:17:55-0400

φx=6xy,\varphi'_x=6xy,

φy=3x23y2z2,\varphi'_y=3x^2-3y^2z^2,

φz=2y3z,\varphi'_z=-2y^3z,

φ=6xyi+(3x23y2z2)j2y3zk,\nabla \varphi=6xy\vec i+(3x^2-3y^2z^2)\vec j-2y^3z\vec k,

φM=12i9j16k.\nabla \varphi_M=-12\vec i-9\vec j-16\vec k.


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