Mathematics, 15.05.2021 04:20 sierravick123owr441

The numbers 1,2,...,n are written on the board. Every minute, I erase two numbers a and b, and replace them with a+b+ab. Clearly, after n-1 minutes there is only one number left on the board. Does the result depend on the order? For which n can I make the resulting number be odd?

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The numbers 1,2,...,n are written on the board. Every minute, I erase two numbers a and b, and repla...

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