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Question Number 214471 by issac last updated on 09/Dec/24

$$d^2-d+2=0$$$$\sum _{k;d^2-d+2=0}\frac{1}{k}=??$$

Answered by mr W last updated on 09/Dec/24

$$1-\frac{1}{d}+\frac{2}{d^2}=0$$$$\mathrm{\Sigma }\frac{1}{d}=-\frac{-1}{2}=\frac{1}{2}✓$$$$\mathrm{\Pi }\frac{1}{d}=\frac{1}{2}✓$$

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