7. Consider the nonlinear model y = f(x1; x2) = 1e 2x1 ???? 3e 4x2 . (a)...

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7. Consider the nonlinear model y = f(x1; x2) = 1e 2x1 ???? 3e 4x2 .

(a) Linearize the model by taking the partial derivatives @f

@ i

; i = 1; 4.

(b) Construct a grid of candidate points in the experimental region range 1  x1  7; 1  x2  7.

(c) Use proc optex to construct a D-optimal nonlinear design for this model using the initial estimates 1 = 10:0, 2 = ????0:5, 3 = 5:0, and 4 =

????2:0.

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