Last couple of exams next week and there is a repeating question in the past papers that I cant do. Ive searched extensivly and cant find the answer 
Its the derivation of a product rule in vectors.
Where 'f' is a scaler function and 'A' is a vector point function.
As far as I know I keep getting out all three terms to be the same. There has to be some cancellation somewhere but I cant figure out where and the lecture notes dont help.
Thanks for reading
Its the derivation of a product rule in vectors.
Where 'f' is a scaler function and 'A' is a vector point function.
As far as I know I keep getting out all three terms to be the same. There has to be some cancellation somewhere but I cant figure out where and the lecture notes dont help.
Thanks for reading
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