7. Find the directional derivative of the function f(x,y)=(x+y)/(x-y) at point (1,-1) in the direction v=
.(10分)
阿摩線上測驗
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阿摩線上測驗
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7. Find the directional derivative of the function f(x,y)=(x+y)/(x-y) at point (1,-1) in the direction v=.(10分)