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# pls help!!!!

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There are three real numbers $$f(x) = \frac{1}{1+\frac{1}{1+\frac 1x}}.$$ that are not in the domain of What is the sum of those three numbers?

Jul 15, 2022

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The three real numbers are 0, 1, and 3/2, so the answer is 5/2.

Jul 15, 2022