Jawabanmu

2014-04-05T04:54:29+07:00
Diket : s = 25 cm . M= 4x ditanya: f? jwb: M = s'/s 25=s'/4 s'= 25×4 =100 1/f= 1/s + 1/s' 1/f = 1/25 + 1/100 1/f = 4/100 + 1/100 1/f = 5/100 f= 100/5 =20 cm