mohon bantuannya yang jago fisika nomer 11 makasih :)

M = -s' / s = h' / h
M = 1/16 h / h = 1/16
s' = -Ms = -1/16 s

1 / f = 1 / s + 1 / s'
f = s's / (s' + s)
  = (-1/16 s)s / (-1/16 s + s)
  = -1/16 s² / (15/16 s)
  = -1/15 s
  = -1/15 (2 m) = -2/15 m