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6. (a) Give the defnition of the directional derivative of f(x, y)at (a,b) in the direction of a uni
問題詳情
6. (a) Give the defnition of the directional derivative of f(x, y)at (a,b) in the direction of a unit vector u = (u,v), u2 + v2 = 1.
參考答案
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2.=?
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