Jawabanmu

Jawaban paling cerdas!
2014-05-06T21:29:55+07:00
1/s + 1/s' = 1/f 1/20 + 1/s' = 1/15 3/60 + 1/s' = 4/60 1/s'= 1/60 s' = 60 perbesaran = | -s'/s | = | -60/20 | = 3 perbesaran = 3 kali
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