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s' = 24cm
f = 6cm
cermin cekung +f
ditanya perbesaran M..?
pertama cari dulu jarak benda ke cermin s.?
1/f = 1/s + 1/s'
1/6 = 1/s + 1/24
1/s = 1/6-1/24
1/s = (4-1)/24
1/s = 3/24
3s = 24
s = 24/3
s = 8cm
M = s'/s
M = 24/8
M = 3 kali