Question: Explain why the function is differentiable at the given point. Then find the linearization L(x, y) of the function at that point. f (x, y)

Explain why the function is differentiable at the given point. Then find the linearization L(x, y) of the function at that point.
f (x, y) = 1 + y/1 + x , (1, 3)

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