Let R be any ring. If f(X) = ao + α₁X + a₂X² + . = ao + a₁X + a₂X² + ... + a₂X¹ € R[X], define the anX" (formal) derivative of f by f'(X) = a₁ + 2a₂X+nan X-1. Prove that for any polynomials f(X), g(X) € R[X], (ƒ(X) + g(X))' = f'(X) + g'(X) (f(X)g(X))' = f(X)g'(X) + f'(X)g(X)

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