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- ...n</math> for which <math>2^n + 5^n - n</math> is a multiple of <math>1000</math>. ...25</math> both divide it. It should be fairly obvious that <math>n \geq 3</math>; so we may break up the initial condition into two sub-conditions.16 KB (2,240 words) - 22:16, 26 January 2024
