Difference between revisions of "2005 IMO Problems/Problem 4"
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Determine all positive integers relatively prime to all the terms of the infinite sequence <cmath> a_n=2^n+3^n+6^n -1,\ n\geq 1. </cmath> | Determine all positive integers relatively prime to all the terms of the infinite sequence <cmath> a_n=2^n+3^n+6^n -1,\ n\geq 1. </cmath> | ||
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| + | ==Solution== | ||
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| + | The Answer is 1. | ||
Revision as of 15:42, 28 August 2022
Determine all positive integers relatively prime to all the terms of the infinite sequence ![\[a_n=2^n+3^n+6^n -1,\ n\geq 1.\]](http://latex.artofproblemsolving.com/a/3/f/a3f3c15ee9d92c2eb2747f800d908cfa7aa6a08b.png)
Solution
The Answer is 1.
