Question: 3 . 3 9 Let A = x a x + y a y + z a z ( x 2 + y 2 +

3.39 Let A=xax+yay+zaz(x2+y2+z2)32; show that gradA=0.
3.39 Let A=xax+yay+zaz(x2+y2+z2)32; show that gradA=0.

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