Jawabanmu

2014-05-25T18:09:32+07:00
Dik: s=12 cm M = -2× Dit: R =? Jb: M = s‘/s -2×= s‘/12 s‘= -24 cm 1/f= 1/s+1/s‘ 1/f= 1/12+1/-24 1/f = (2-1)/24 f = 24 cm
2014-05-25T18:35:01+07:00
Dik: s= 12 cm
M= 2 kali
dit : R

M= s'/s
2=s'/12
s'=24

1/f= 1/s+1/s'
=2+1/4
1/f= 3/24
f=8
R=2f
R=2x8=16