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The function g(x) =[ x+b, x < 0; cos x, ...

The function `g(x) =[ x+b, x < 0; cos x, x >= 0`, can be made differentiable at x = 0

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The function g(x) = {{:(x+b",",x lt 0),(cos x",",x ge 0):} cannot be made differentiable at x = 0.

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