How is this product of terms calculated?

[crv357]

\prod_{j \neq i}^{6} \frac{\lambda_{i}}{\lambda_{i}-\lambda_{j}}

Π j≠i a 6 λ_i(λ_i - λ_j)

 

[berkeman]

\prod_{j \neq i}^{6} \frac{\lambda_{i}}{\lambda_{i}-\lambda_{j}}

Π j≠i a 6 λ_i(λ_i - λ_j)

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