Consider a function z = F(u(s, t), v(s, t)) where F, u, and v are differentiable and u(8, 6) = −1, v(8, 6) = 2, u, (8, 6) = 5, u, (8, 6) = 9, us(8, 6) = −3, v₁(8, 6) = 4, Fu(-1,2)=-4, and F(-1,2)= -10. Computed and when s = 8 and t = 6 dt

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