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Distance between parallel planes?

  1. Mar 25, 2009 #1
    1. The problem statement, all variables and given/known data
    How do I determine the distance between the parallel planes
    2x-4y+ 2z = 5 and -2x+4y-2z= -9: ___?


    2. Relevant equations



    3. The attempt at a solution

    I got 1/4, but I think that is wrong. Any help would be great!
     
  2. jcsd
  3. Mar 25, 2009 #2
    Why don't you show how you got 1/4, and let's see what we can do to help.
     
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