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Find equations for the tangent plane and normal line of f(x,y)=6-3x2-y2 at the point P(1,2,-1).

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Find equations for the tangent plane and normal line of f(x,y)=6-3x2-y2 at the point P(1,2,-1).
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Equations for a tangent plane and normal line are found. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.

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