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Question: A problem about plot the part of the surface

Question:A problem about plot the part of the surface

plasticman 10 Maple
May 25 2013
0

plot part of the surface f(x,y)=10-x^2-3y^2:

plot3d(10-x^2-3y^2, x=-1 .. 4, y=1 .. 2, view=0 .. 11, axes= normal); (press enter)

 

Determine the normal vector and the equation of the tangent plane at the point (2,1,3) on the surface.

Display the surface , a black vector and the tangent plane, and give the equation for each of them

label the normal vector and the tangent plane, and give the equation for each of them

 

anyone can help me, please :( 

I feel very confused :( 
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