Find the first-order partial derivatives of the function . Differentiate f(x,y) with respect to x: ______; differentiate f(x,y) with respect to y: ______. (Note: write x^2 for denoting , and x_2 for denoting .)
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举一反三
【简答题】原文:He who flatters one to the face will surely speak ill of one behind one’s back. 译文: _____谄媚的人,_______必诋毁。