Results 1 to 2 of 2

Math Help - Intersection of two plane

  1. #1
    Newbie
    Joined
    Sep 2009
    Posts
    9

    Intersection of two plane

    guys please help me with this problem, i am sooo confused

    Find the intersection:
    x+y+z=-1( negative 1)
    x+y=5

    The book says the answer is X=-t
    Y=5+t
    Z=-6

    i dont know how!!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor Calculus26's Avatar
    Joined
    Mar 2009
    From
    Florida
    Posts
    1,271
    1)x+y+z=-1

    2) x+y=5


    The intersection of 2 planes is a line

    subtract 1) - 2) to get z = -6

    This leaves (if you plug in z = - 6)

    1)x+y= 5

    2) x+y=5

    Which is true for all real numbers

    Let x = t then y = 5 - t

    So the parametric equations of the line is x= t y = 5- t z = -6
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Intersection of a plane 3D Geo
    Posted in the Geometry Forum
    Replies: 3
    Last Post: April 29th 2011, 11:38 PM
  2. Intersection of paraboloid and plane
    Posted in the Calculus Forum
    Replies: 6
    Last Post: February 10th 2011, 07:00 AM
  3. Intersection of plane curves
    Posted in the Math Challenge Problems Forum
    Replies: 5
    Last Post: November 11th 2010, 04:22 PM
  4. Intersection of plane with sphere
    Posted in the Geometry Forum
    Replies: 8
    Last Post: October 12th 2010, 08:46 AM
  5. intersection of a plane
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: September 21st 2010, 02:38 AM

Search Tags


/mathhelpforum @mathhelpforum