Jawabanmu

2014-05-13T20:06:36+07:00
S = 4 cm
f = 28 cm

a. s' = ...
   1/f = 1/s + 1/s'
   1/28 = 1/4 + 1/s'
   1/s' = 1/28 - 1/4
   1/s' = 1/28 - 7/28
   1/s' = -6/28 = 28/-6
   s' = -4,6 cm

b. m = ...
    M = s'/s = - 4,6/4 = 1,16 kali


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