PTLG cơ bản

De co the giai cac bai toan luong giac phuc tap doi chut thi cac ban phai nam vung cac bai toan co ban cung nhu nhung phuong phap lam thuong dung. De rut ra nhung cai do cac ban hay cung nhau lam cac bai luong giac co ban sau nhe. click here