題組內容
第三部分：計算題
(3) Find the gradient vector of the function f(x,y) := 
. Then find the equation of the tangent plane at (2,0).
阿摩線上測驗
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阿摩線上測驗
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(3) Find the gradient vector of the function f(x,y) := . Then find the equation of the tangent plane at (2,0).