How are lim xa - f(x) and lim xa + f(x) calculated if f is a polynomial

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How are limx→a- f(x) and limx→a+ f(x) calculated if f is a polynomial function?

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Calculus Early Transcendentals

ISBN: 978-0321947345

2nd edition

Authors: William L. Briggs, Lyle Cochran, Bernard Gillett

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