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MathNet 2014 Question 76

Math Olympiad Vault · MathNet 2014

Question 76

For $1 \leq j \leq 2014$, define

$$
b_{j} = j^{2014} \prod_{i=1, i \neq j}^{2014} (i^{2014} - j^{2014})
$$

where the product is over all $i \in \{1, \ldots, 2014\}$ except $i = j$. Evaluate
$$
\frac{1}{b_{1}} + \frac{1}{b_{2}} + \cdots + \frac{1}{b_{2014}}
$$