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Let F (x1, x2) = ln(1 + 4x1 + 7x2 + 6x1x2), x = (x1, x2)...

Let F (x1, x2) = ln(1 + 4x1 + 7x2 + 6x1x2), x = (x1, x2) ∈ R .

→−

(a) Find the linearization of F at 0 .

Show F is continuously differentiable, that is, C , at 0 .

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