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Question: Drawing together a function of two variable and its tangent plane at a given point in 3D

Question:Drawing together a function of two variable and its tangent plane at a given point in 3D

Vahid_math 15 Maple 18
plotting tangent-plane
April 17 2019
0

How can I draw together the function f(x,y)=(x.y^2)+1 and its tangent plane at the point (2,1,f(1,2)) in each of the following rectangles? 

(Note that the equation of the tangent plane at the given point is z=x+4y-3)

a. 2<=x<=3 and 1<=y<=3

b. 2<=x<=2.1 and 1<=y<=1.2

c. 2<=x<=2.01 and 1<=y<=1.02
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