Jawabanmu

Jawaban paling cerdas!
2014-02-09T15:04:48+07:00
1/f= 1/s+1/s'
1/s= 1/f-1/s'
1/s=1/4-1/6
1/s=(3-2)/12
1/s=1/12
s=12

jadikan jawaban terbaik donk?

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