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referring not to the derivation of Golden Ratio, but to the other problem given on my page:
Sqrt(1 + Sqrt(1 + Sqrt(1 + ...)))
In this case, there is only plusses. The square root is therefore positive.
Hi FF. I'm afraid I still don't agree that there are only plusses in this! You have an overarching square root and that could be either positive or negative.
...that said, I don't use algebra, geometry, trig, analytic geometry almost every day at work. My maths these days is more about how much the groceries cost and how much is in my purse!
I suspect the key difference here may be that you are working from an approach of daily applied maths (where lots of theoretically possible 'solutions' are clearly wrong or impossible in the 'real world') and I am working from my (hopefully correctly but it's been a long time!) remembered pure maths.
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