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Each diagram represents the level curves of a function.
For each function, consider the point above on the surface .
(a) If the vectors below are normal to the surface at the point , match each vector to a diagram.
1.
2.
3.
4.
(b) If the equations below are tangent planes to the surface at the point , match each equation of the plane to a diagram.
1.
2.
3.
4.
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