Recent content by Feixiang

  1. Feixiang

    Help logarithm function

    construct an "inverse" fn of lg*, := 2^^n, means 2^2^2^2....^2 (# of 2 is n); so for 2^^(n-1)<x<=2^^(n), we have lg* (x)=n+1 lhs=lg*(lg(x)), lhs=n rhs=lg(lg*(x)), rhs=lg(n+1) at last solve this transcendental eq: n=lg(n+1) we get n=1, i.e. x=2 is the symmetric point x>2, lhs>rhs x<=2, =
  2. Feixiang

    The Master Happy Birthday thread

    happy happy birthday :>
  3. Feixiang

    The Master Happy Birthday thread

    :dance:happy happy, party party.
  4. Feixiang

    The Master Happy Birthday thread

    happy happy,party party
  5. Feixiang

    The Master Happy Birthday thread

    happy happy birthday , haha. party tonight?
  6. Feixiang

    class dinner time

    whenever for me :)
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