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How do I find the tangent plane to surface? I need to find the tangent plane at (3,4,-3) for the equation: x^2+y^2-z^2-4xy+4xz=-68?

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  • How do I find the tangent plane to surface? I need to find the tangent plane at (3,4,-3) for the equation: x^2+y^2-z^2-4xy+4xz=-68?


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