Find the point(s) on the surface at which the tangent plane is horizontal. z = 4x +
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Find the point(s) on the surface at which the tangent plane is horizontal.
z = 4x² + 4xy - 2y² + 8x - 5y - 4
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Fx y z 4x 4xy 2y 8x 5y 4 z ...View the full answer
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