सिद्ध कीजिए कि ""^nCr+""^nC(r-1)=""^(n...

सिद्ध कीजिए कि
`""^nC_r+""^nC_(r-1)=""^(n+1)C_r`

सिद्ध कीजिए कि ""^nCr+""^nC(r-1)=""^(n+1)Cr
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.(n–r+ 1) * ^nC(r-1) = m*^nCr হলে, m =
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.^nCr = (n-r+1)/r *^nC(r-1)
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.^nC(r-1) = 36, ^nCr = 84 এবং .^nC(r+1) = 126 হলে n ও r-এর মান নির্ণয...
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If ""^nCr denotes the number of combinations of n things , taken r at ...
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""^(n) C(r+1)+2""^(n)C(r) +""^(n)C(r-1)=
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prove the result ^(n+1)Cr=^nC(r-1)+^nCr
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Prove that (""^nCr)/(""^nC(r-1))=(n-r+1)/r
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Prove that ""^nCr+^nC(r-1)=^(n+1)Cr
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