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Omni-MATH / Let f(x)=x²+x⁴+x⁶+x⁸+⋯, for all real x such that the sum converges. For how many real numbers x does f(x)=x ? · Discussion

Discussing Let f(x)=x²+x⁴+x⁶+x⁸+⋯, for all real x such that the sum converges. For how many real numbers x does f(x)=x ? · Omni-MATH

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