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How many linear functions (functions of the form f(x)=ax+b) are equal to their own inverse? Answer with a non-negative integer or with "inf" for "infinitely many."

 Aug 1, 2023
 #1
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There are only two that work: f(x) = x and f(x) = -x.

 Aug 1, 2023
 #2
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This is wrong. There are infinitely many linear functions that are an inverse of themselves.

Guest Aug 2, 2023
 #3
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It is correct, could you give us some examples of other inverse functions?

plaintainmountain  Aug 3, 2023

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