Bonjour,
si tu as pu traiter les questions 1) et 2), tu as déterminé :
OA = -20,0 cm et OA' = 80,0 cm
et donc 1/OF' = 1/OA' - 1/OA = 1/80,0 + 1/20,0 = (1 + 4)/80,0 = 5/80,0
⇒ OF' = 80,0/5 = 16,0 cm
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Bonjour,
si tu as pu traiter les questions 1) et 2), tu as déterminé :
OA = -20,0 cm et OA' = 80,0 cm
et donc 1/OF' = 1/OA' - 1/OA = 1/80,0 + 1/20,0 = (1 + 4)/80,0 = 5/80,0
⇒ OF' = 80,0/5 = 16,0 cm