Prove that if (x, y) is differentiable and (x,y) = 0 for all (x, y), then
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Prove that if ƒ(x, y) is differentiable and ∇ƒ(x,y) = 0 for all (x, y), then ƒ is constant.
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Since V fx fy 0 0 for all x y we have 1 Let Qo xo yo be a ...View the full answer
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