1/s' = 1/f - 1/s
1/s' = -1/30 - 1/20 = -5/60
s' = -60/5 = -12 cm
sifat : maya, tegak, diperkecil
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1/s' = 1/f - 1/s
1/s' = -1/30 - 1/20 = -5/60
s' = -60/5 = -12 cm
sifat : maya, tegak, diperkecil