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maths problem

  • 01-06-2007 11:22pm
    #1
    Shox
    Closed Accounts Posts: 78 ✭✭


    1996 Q.1 (c) (i)

    Make a sketch of the region of the plane represented by y>lxl and y<2+lxl

    Any ideas???


Comments

  • #2
    Delphi91
    Registered Users, Registered Users 2 Posts: 1,501 ✭✭✭Delphi91


    Graph1.jpg

    Try this - its the area bounded by the two lines.


  • #3
    JC 2K3
    Closed Accounts Posts: 7,794 ✭✭✭JC 2K3


    They don't seem to ask those "make a sketch of the region of the plane" questions anymore...

    Not that it's very hard or anything.


  • #4
    CosaFada
    Closed Accounts Posts: 28 ✭CosaFada


    omg i dont get that!!can anyone explain it to me??


  • #5
    JC 2K3
    Closed Accounts Posts: 7,794 ✭✭✭JC 2K3


    No.

    Simply because you said "omg".


  • #6
    ray giraffe
    Registered Users, Registered Users 2 Posts: 338 ✭✭ray giraffe


    CosaFada wrote:
    omg i dont get that!!can anyone explain it to me??
    Think about the points on the graph y = lxl . These are in a V shape coming up from the origin. (the red V in the graph)

    y > lxl has all points above this V shape
    y = lxl + 2 is the same graph, except the y values are 2 units higher (the blue V), i.e. 2 squares higher. y < lxl + 2 has all points below the blue V.

    So if you have both of these inequalities, then you have the area between the red and blue V's.

    Hope this helps.


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