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Vector Calculus Question
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I think this is a simple question but I can't get my head around it:
Draw and describe geometrically the level surfaces of the functions below and, in each case, show that gradf is normal to the level surface at any point.
f = ax by cz, where a, b, and c are constants.
Wouldn't that be in 4d or something I very confused. Any help would be great.
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