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babeangle
2 năm trước
đặt một vật sáng ab dạng mũi tên cao 1,5 cm vuông góc của trục chính của 1 thấu kính hội tụ có tiêu cự 18 cm,A nằm trên trục chính cách thấu kính 12 cm .Xác định vị trí và độ cao ảnh? Giúp em vs ạ😊😊
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