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Euc20197/Sub-Problem 2

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Problem

Consider the function $f(x) = x^2 - 2x$ . Determine all real numbers $x$ so that $x$ satisfy $f(f(f(x))) = 3$

Video Solution

https://www.youtube.com/watch?v=M4gzTG8HnQ4

~North America Math Contest Go Go Go

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