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Homework Help: Vectorial algebra

  1. Jan 17, 2009 #1
    1. The problem statement, all variables and given/known data
    The line l passes through the point P=(1,-1,1) and has direction vector d=[2,3,-1]. Determine whether l and P are parallel, perpendicular, or neither to 2x+3y-z=1.


    2. Relevant equations

    n.x=n.p, also cross product for parallel lines, and dot product for perpendicular.

    3. The attempt at a solution
    I don't know how to relate the point, P, to the directional vector,d. I am pretty sure that I can do the rest.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jan 17, 2009 #2

    Dick

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    Science Advisor
    Homework Helper

    P isn't related to d, they are independent. 2x+3y-z=1 is a plane. What it's normal vector? Question like this probably don't belong in Physics. I'd put them in a math HW forum.
     
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