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Math Help - help with matlab please

  1. #1
    Newbie
    Joined
    Mar 2009
    Posts
    17

    help with matlab please

    1. Consider the part of the surface f(x; y) = x^2y-xy^3 + 8 over the
    rectangle D = {(x, y) : 0 <=x <=2 , -1 <=y <=2}.
    (a) Plot the surface over D. Using a 30 by 30 grid.
    (b) Construct a contour plot of that part of the surface with 30 con-
    tours.
    (c) Plot the surface together with its tangent plane at the point where
    x = 0.8 and y = 0.5. Choose a vantage point from which you
    can see that the plane is tangent to the surface (include the point
    of Tangency as part of your plot).

    2. (a) Use the integration commands in the symbolic tool-kit to find the
    volume of the solid region between the xy-plane and the surface
    drawn in Question 1.
    (b) Use the numerical integration command dblquad to find the vol-
    ume of the solid region between the xy-plane and the surface
    drawn in Question 1.

    i have no idea any can help me plz
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  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
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    someplace
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    Thanks
    4
    Quote Originally Posted by fearless901 View Post
    1. Consider the part of the surface f(x; y) = x^2y-xy^3 + 8 over the
    rectangle D = {(x, y) : 0 <=x <=2 , -1 <=y <=2}.
    (a) Plot the surface over D. Using a 30 by 30 grid.
    (b) Construct a contour plot of that part of the surface with 30 con-
    tours.
    (c) Plot the surface together with its tangent plane at the point where
    x = 0.8 and y = 0.5. Choose a vantage point from which you
    can see that the plane is tangent to the surface (include the point
    of Tangency as part of your plot).

    2. (a) Use the integration commands in the symbolic tool-kit to find the
    volume of the solid region between the xy-plane and the surface
    drawn in Question 1.
    (b) Use the numerical integration command dblquad to find the vol-
    ume of the solid region between the xy-plane and the surface
    drawn in Question 1.

    i have no idea any can help me plz
    Your first stop should always be the documentation, either the documentation browser, or type "help topic" at the command prompt, or type "matlab help topic" into google.

    CB
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