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Omni-MATH / Consider all functions f:Z→Z satisfying f(f(x)+2x+20)=15 Call an integer n good if f(n) can take any integer value. In other words, if we fix n, for any integer m, there exists a f… · Discussion

Discussing Consider all functions f:Z→Z satisfying f(f(x)+2x+20)=15 Call an integer n good if f(n) can take any integer value. In other words, if we fix n, for any integer m, there exists a f… · Omni-MATH

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