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Math Help - URGENT VECTOER EQUATION HELP

  1. #1
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    URGENT VECTOER EQUATION HELP

    1. Compute a Cartesian equation for the plane through the points (1, 2,3), (2, 5, 7) and (1, 1, 3).

    2. Adapt the method used in (i), to compute a Cartesian equation for the plane through (1,3, 1) and parallel to the plane through (2,2, 3), (4, 1,1) and (1, 1,1).

    can some 1 help me with these two question. ASAP!!

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  2. #2
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    Quote Originally Posted by bob_smith View Post
    1. Compute a Cartesian equation for the plane through the points (1, 2,3), (2, 5, 7) and (1, 1, 3).

    2. Adapt the method used in (i), to compute a Cartesian equation for the plane through (1,3, 1) and parallel to the plane through (2,2, 3), (4, 1,1) and (1, 1,1).



    can some 1 help me with these two question. ASAP!!

    (Accidental) double post.
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  3. #3
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    Quote Originally Posted by mr fantastic View Post
    (Accidental) double post.
    Yeah, sorry about that
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  4. #4
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    1) First find a normal vector to the plane.

    (2,5,7)\times(1,2,3)=(1,1,-1)

    So the plane will take the form.

    x+y-z=c \mbox{ for some }c

    Sub in the other point (-1,1,3) to find c.

    2) Apply similar argument.
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