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truong2011
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
Bai 33 Bai toan ve quang dien thieu bai giang phan 3 roi a ,hinh nhu la phan cong thuc ,mong hoc mai xem xet lai gium .Cho em hoi luon neu bo xung bai giang thi vao dau xem a
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