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Showing content with the highest reputation on 02/25/2018 in all areas

  1. 1 point
    Diketahui \[S=1! \cdot 1 + 2! \cdot 2 + 3! \cdot 3 + ... + k! \cdot k\] dengan $k \in \mathbb{N}$. Buktikan bahwa sisa dari $\frac{S}{k+1}$ adalah $k$.
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