I was given the following proof (for a method for figuring out the time taken to completely pay of a loan):
The proof makes sense up until z-(1 + I) = 0.
How did they go from [An - (1 + I)An-1] to [z - (1 + 0)]?
2026-03-25 17:38:34.1774460314
Understanding a mathematical solution to a debt race question.
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