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Omni-MATH / Find all functions f:R→R which satisfy the following equality for all x,y∈R f(x)f(y)−f(x−1)−f(y+1)=f(xy)+2x−2y−4.[i] · Discussion

Discussing Find all functions f:R→R which satisfy the following equality for all x,y∈R f(x)f(y)−f(x−1)−f(y+1)=f(xy)+2x−2y−4.[i] · Omni-MATH

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