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-1/8=1/s+1/6
-1/s=1/6+1/8
1/s=-1/6-1/8
1/s=-4/24-3/24
1/s=-7/24
s=-3,42 cm
=
=
= s
s= -3,42 cm
note: - menunjukkan bahwa benda itu ada dibelakang cermin