x² - Find a linear approximation to f(x,y) = at (1,2). Use your result to find an approximation for Зу - 5 f(1.1,1.9), and compare the approximation with the value of f(1.1,1.9) that you get when you use a calculator. ..... The linear approximation for f(1.1,1.9) is L(1.1,1.9) = (Type an integer or decimal for each matrix element. Round to two decimal places as needed.)

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