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Let \[f(x) = \frac{2x + 3}{kx - 2}.\]Find all real numbers $k$ so that $f^{-1}(x) = f(x).$

 

so I know Cphill answered it and k cannot = x/2 but how do I express in interval notation

 Dec 17, 2020
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See my answer under your original post....

 

cool cool cool

 Dec 17, 2020

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