Jawabanmu

2014-06-09T21:29:20+07:00
1/f = 1/s + 1/s'
1/5 = 1/10 + 1/s'
2/10 - 1/10 = 1/s'
1/10 = 1/s'
s' =10 cm
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M = s'/s
M = 10/10
M = 1x