Jawabanmu

2014-05-25T17:04:24+07:00
1/s + 1/s' = 1/f
1/8 + 1/s' = 1/12
1/s' = 1/12 - 1/8
= - 1/24
Hasilnya 24
hasilnya -24 yang diatas masih 1/s'
makasihh yahh udah jawab :)
2014-05-25T17:08:33+07:00
1/12 - 1/8 = 4-6/48= -2/48=-1/12 = 12