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Let a E R. let f be a differentiable function at 3. Assume f'(a) at 0. let b = f(a). Then you know that f'1 is differentiable at b and 1 (1\") (b) = m) (1) Now assumefhas all its derivatives. It follows that f('1) also has all its derivatives. Find equations similar to (1) for (f'1)\"(b) and (f'1)'\"(b) in terms of the derivatives off evaluated at a