Find the equation of the tangent plane of function f(x, y) = √20-3x² - 2y² at the point (-1, -2). z= Use the equation of the

Question

Find the equation of the tangent plane of function f(x, y) = √20-3x² - 2y² at the point (-1, -2).
z=
Use the equation of the tangent plane to estimate the value of f(-1.1, -1.9) =

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