Let f(x) = ax + b / cx - a. Show that f(f(x)) = x, provided a2

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Let f(x) = ax + b / cx - a. Show that f(f(x)) = x, provided a2 + bc ≠ 0 and x ≠ a/c.
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Calculus

ISBN: 978-0131429246

9th edition

Authors: Dale Varberg, Edwin J. Purcell, Steven E. Rigdon

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