Bài tập toán cao cấp tập 2

PTVP là phương trình mà hàm phải tìm nằm dưới dấu đạo hàm hoặc vi phân..Cấp của ptvp là cấp cao nhất của đạo hàm của ẩn hàm.Nếu ẩn hàm là hàm 1 biến  PTVP thường. Nếu ẩn hàm là hàm nhiều biến  PTVP đạo hàm riêng.Hệ PTVP là hệ gồm nhiều PTVP và nhiều ẩn hàm.

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