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  1. ...sum of each row is 10 higher than the sum of the previous row (you add k on the left but and you drop k-10 on the right which is a difference of k - (k...

    2 Answers · Science & Mathematics · 18/07/2019

  2. ...(m,s−1) (2k−1)C(2n,2k−1) = (2n−2k+2)C(2n,2k−2) = 2(n−k+1)C(2n,2k−2) for n≥k≥1 (2k−1) is odd hence 2 | C(2n...

    2 Answers · Science & Mathematics · 13/07/2019

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