x = x(u, v), y = y(u, v), with x(-1,6) = 1 and y(-1,6) = 5, calculate z,(-1,6) in terms of some of the Given z = f(x, y), ues given in the table below. fx(-1,6) = r f,(-1,6) = px„(-1,6) = b y„(-1,6) = q| | fx(1,5) = 1 f,(1, 5) = -5 x,(-1,6) = c y,(-1,6) = a -1,6) =

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