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s=8 cm
f=12 cm
dit: A. s'=...?
B.sifat:..?
A.s'=..?
1/f=1/s+1/s'
-1/s'=1/s+1/f
-1/s'=1/8+1/12
-1/s'=3+1/24
-1/s'=4/24
-1/s'=1/6
s'=-6 cm
b.maya, tegak,diperkecil