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show-that-C-n-k-C-n-1-k-1-C-n-2-k-1-C-k-k-1-C-k-1-k-1-




Question Number 129642 by SOMEDAVONG last updated on 17/Jan/21
show that C_n ^k =C_(n−1) ^(k−1) +C_(n−2) ^(k−1) +....+C_k ^(k−1) +C_(k−1) ^(k−1) .
showthatCnk=Cn1k1+Cn2k1+.+Ckk1+Ck1k1.

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