function z=f(x, y) be given such that Let the differentiable = -1 , = 4 (1,2) and x=t?uv, y=u+tv² .When ay (1,2) then which of the following is the value of the partial derivative at the point (t,u, v) = (1, 1, 1) ? (a) 2 (b) 3 (c) 5 (d) 7 (e) 9

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