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Question Number 188981 by Mingma last updated on 10/Mar/23

Answered by HeferH last updated on 10/Mar/23

Commented by HeferH last updated on 13/Mar/23

$$\frac{r+1}{\sqrt{5}+1}=\frac{1}{\sqrt{5}-1}$$$$r=\frac{\sqrt{5}+1}{\sqrt{5}-1}-1=\frac{2}{\sqrt{5}-1}=\frac{2\sqrt{5}+2}{4}=\frac{1+\sqrt{5}}{2}$$

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