3. Suppose that a function f(x, y) is differentiable at the point (-2, 1) with fx(-2, 1) = 2 and f(-2, 1) = -1. Let
3. Suppose that a function f(x, y) is differentiable at the point (-2, 1) with fx(-2, 1) = 2 and f(-2, 1) = -1. Let L(x, y) denote the local linear approximation of f at (-2, 1). If L(-2.1, 1.1) = -1.4, determine the value of fy(-2, 1)
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