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Multivariable CalculusMediumPartial Derivatives & the Gradient

Partial Derivatives & the Gradient · Medium problem

Let f(x,y)=4x2y+2xy+2y2f(x, y) = 4 x^{2} y + 2 x y + 2 y^{2}. Find fy(−2,−1)f_y(-2, -1).