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anonymous
 one year ago
Is this correct? (Horizontal tangent)
In which point do the tangent have an horizontal tangentplane?
z = x^2 + 9^2/9  9
My solution is (0, 0, 9)  is this right?
Here is my math:
http://i.imgur.com/lr7vSru.png
I dont *quite* understand it, but the way I understand it, the plane where this equation (elliptic paraboloid) has an horizintal tangentplane, is on the top/bottom of it  which , I believe would be when Z_x = 0 and Z_y = 0.
No? Yes?
anonymous
 one year ago
Is this correct? (Horizontal tangent) In which point do the tangent have an horizontal tangentplane? z = x^2 + 9^2/9  9 My solution is (0, 0, 9)  is this right? Here is my math: http://i.imgur.com/lr7vSru.png I dont *quite* understand it, but the way I understand it, the plane where this equation (elliptic paraboloid) has an horizintal tangentplane, is on the top/bottom of it  which , I believe would be when Z_x = 0 and Z_y = 0. No? Yes?

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