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  3. 研究所、轉學考(插大)-微積分
  4. 18. Find the directional derivative of g(x, y) = x..

研究所、轉學考(插大)-微積分題庫

【非選題】
18. Find the directional derivative of g(x, y) = x² + y² + 1 at P(1, 2) in the direction of Q(2, 3).