Respostas

2013-03-31T19:03:05-03:00

a)i=o/2 p=o

i/o=-p/p = o/2/o-p/o p=40

 

b) 1/f=1/di+1/do = 1/f=1/20+1/40 = 1/f=2-1/40= 1/40= 1/f=1/40 f=10cm

103 1 103