tolong yang jago mateamtika nomer 2dengan caranya yang lengkap

Jarak Fokus = ½ × 60 = 30 cm
s' = 3s

1/s + 1/3s = 1/f
1/s + 1/3s = 1/30
3 + 1/3s = 1/30
4/3s = 1/30
3s = 30 × 4
3s = 120
s = 40
Jarak Benda = 40 cm

s' = 3s
s' = 3(40)
s' = 120
Jarak Bayangan = 120 cm

Maaf Kalau Salah

-3(t+2)-5(t+2)=-6
(t+2)(-3-5)=-6
(t+2)(-8)=-6
(t+2)=-6/(-8)
t = 6/8-2 = 6/8 -16/8 = -10/8