Question

yang tau kak............​

Answer 1

Jawaban:

M = 4

s' = 20 cm

f = ?

M = s'/s

4 = 20/s

s = 20/4 = 5 cm

1/f = 1/s + 1/s'

1/f = 1/5 + 1/20

1/f = 4/20 + 1/20 = 5/20

f = 20/5 = 4 cm

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