Respostas

2014-05-21T17:31:57-03:00
P = 50 cm

I/O = -p'/p = 1/3

p' = -p/3

1/f = 1/p + 1/p'

1/f = 1/p - 3/p

1/f = -2/p

f = -p/2

f = -50/2

f = -25 cm

OPÇÃO (B)