Jawabanmu

Jawaban paling cerdas!
2014-05-15T18:52:52+07:00
A).1/f=1/s+1/s'
1/20-1/30=1/s'
1/60=1/s'
s'=60cm
b).M=s'/s
=60/30
=2 kali
c).M=h'/h
2=h'/10
h'=20cm
d).P=100/f=100/20=5D(5 dioptri)
2 5 2