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Mathematics, 06.10.2019 18:30 maleah12x

How to prove that δf(x₀,y₀,z₀) · γ'(t_0) = 0 given f(x, y,z) = x² + 4y² + 9z² and γ(t) = (x(t), y(t), z(t)) wich images is a part of the level surface x² + 4y² + 9y² = 1? (consider δf as the gradient, brain. ly does not have nabla)

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How to prove that δf(x₀,y₀,z₀) · γ'(t_0) = 0 given f(x, y,z) = x² + 4y² + 9z² and γ(t) = (x(t), y(t)...
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