Recent content by Kyle1

  1. K

    MHB Non-Negative Reals and Inequality: A Proof of xy+yz+zx-xyz≤2

    I don't think it is clear.Can you prove it carefully? If you say so, when xy+yz+zx-xyz is equal to 0? I mean x=? y=? z=?
  2. K

    MHB Non-Negative Reals and Inequality: A Proof of xy+yz+zx-xyz≤2

    Oh! Thanks for showing me my mistake. It was AM-GM, not Cauchy inequality haha ;) The left part of the solution is complex :(
  3. K

    MHB Non-Negative Reals and Inequality: A Proof of xy+yz+zx-xyz≤2

  4. K

    MHB Graphing Inequality : lx-yl + lxl - lyl ≤ 2

    Sketch the region in the plane consisting of all points (x,y) such that lx-yl + lxl - lyl ≤ 2 I don't know exactly the most appreciated solution to this kind of problem. Can you guys show me a clear answer and if possible, a careful graph please?