Jawabanmu

2014-03-29T08:38:53+07:00
So = 5 cm     f = 10 cm        Ho = 4 cm             Hi =......?

1/f = 1/So + 1/Si
1/10 = 1/5 + 1/Si
1/Si = 1/10 - 1/5
1/Si = -1/10
si = -10

si/so =hi / ho
10/5 = hi/4
hi = 8 cm