Jawapan

  • Pengguna Brainly
2016-02-17T07:34:00+08:00
F(x) = 4/x
f^2(x) = f { f(x) }
          = f (4/x)
          = 4 / 4/x
          = 4x/4
          = x
       x = 0
       k = x
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