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How to show two lines intersect in a vector question.

  1. Dec 7, 2009 #1
    This is a question im stuck on and id really like some help plzzzz !


    Two straight lines are given by the equations:

    R= 17i -9j+9k +a (3i+j+5k)
    R=15i - 8j - k + b (4i + 3j )

    where a and b are scalar parameters.Show that these lines intersect and find the postion vector of their point of intersection.


    The attempt at a solution
     
  2. jcsd
  3. Dec 7, 2009 #2

    Mark44

    Staff: Mentor

    What have you tried? Are there values for a and b where your two equations for R give the same value?
     
  4. Dec 7, 2009 #3
    no they have not given me the value of a or b
     
  5. Dec 7, 2009 #4

    Mark44

    Staff: Mentor

    Well, no, of course not. That's your job to find them.
     
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