Use Lagrange multipliers to find the minimum distance from the point (5,5,4) to the paraboloid z=4-x^2-y^2.
I know a lot about Lagrange multipliers, they're quite easy, but the problem is, how do you find the distance from a point in space to a surface?
I don't know about Lagrange multipliers and read about it here.
If your problem requires finding the distance between a point and a surface, the distance required must be the shortest distance to the point from normal to the surface!
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Then how can I relate that to Lagrange multipliers? I know there is supposed to be 2 equations f(x,y,z) and g(x,y,z) but now I don't know which two equations can I use.