Let c' be the separation vector from a fixed point(x'',y'',z'') to the point (x,y,z) and let c be its length. show that
Gradient(1/c) = -c'(hat)/c^2
Thnaks for the help
AX(BXC) = B(A(dot)C) - C(A(dot)B)
For the left hand side I got
(AyBxCy-AyByCx+AzBxCz-AzBzCx)x(hat) + (-AxBxCy+AxByCx+AzByCz-AzBzCy)y(hat) + (-AxBxCz+AxBzCx-AyByCz+AyBzCy)z(hat)
Is this right?
Where would I go from here to prove the rest?
Thanks for the help
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Thank you for any help
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Thank you