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1/6 + 1/s' = 1/5
s' = 30 cm
M = |s'/s| = 30/6 = 5x
b. 5
Jadi :
Karena f = 1/2r dan r = 10 maka f = 5
1/f = 1/s+1/s'
1/5 = 1/6-1/s'
1/5-1/6 = 1/s'
(6-5)/30 = 1/s'
1/30 = 1/s'
s' = 30
M = s'/s
M = 30/6
M = 5
Perbesaran 5x