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calculate-k-0-n-C-n-k-C-2n-1-k-




Question Number 73045 by mathmax by abdo last updated on 05/Nov/19
calculate  Σ_(k=0) ^n  (C_n ^k /C_(2n−1) ^k )
$${calculate}\:\:\sum_{{k}=\mathrm{0}} ^{{n}} \:\frac{{C}_{{n}} ^{{k}} }{{C}_{\mathrm{2}{n}−\mathrm{1}} ^{{k}} } \\ $$

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