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thduong
2 năm trước
Trong hình vẽ, các điện trở nối giữa 2 điểm đều bằng nhau và bằng R. Tính điện trở tương đương khi mắc nguồn điện vào giữa 2 điểm. a) B và F b) B và D
Thích Trả lời Chia sẻ

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