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Question Number 182506 by Matica last updated on 10/Dec/22
Calculate S = 1×1! + 2×2! + 3×3! + ...+ n×n!
CalculateS=1×1!+2×2!+3×3!+…+n×n!
Answered by mr W last updated on 10/Dec/22
n×n!=(n+1)!−n! ⇒S=(n+1)!−1
n×n!=(n+1)!−n!⇒S=(n+1)!−1
Commented by Matica last updated on 10/Dec/22
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