2x2 If we approximate f(-/4.1,/49.1)' Suppose we have a surface f (x,y) ,which of the following is the Local Linear = у Approximation of f(x,y) using a point (- 2,7) for (x 8 (x+2) – 7 8 (у — 7) + 49 :- - 7 8 (x+2) – 7 8 (у+ 7) + 49 8 = - - 7 1 = -- (x+2) – 7 1 (у — 7) + 7 8 7 1 z=+ - (x+2) + –(y – 7) - - 49 1 1 7 7

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