Recommended Questions
- Prove that n(n -1)(n -2)...... (n-r + 1) = ( n!)/(n-r)!
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- Prove that n(n-1)(n-2)......(n-r+1)=(n!)/(n-r)!
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- Prove that ((n-1)!)/((n-r-1)!)+r.((n-1)!)/((n-r)!)=(n!)/((n-r)!)
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- Prove that (n!)/(r!(n-r)!)+(n!)/((r-1)!(n-r+1)!) =((n+1)!)/(r!(n-r+1...
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- Prove that: (i) (n!)/(r!) = n(n-1) (n-2)......(r+1) (ii) (n-r+1). ...
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- Prove that n(n-1)(n-2) ...(n-r+1)=(n!)/((n-r)!).
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- Prove that : (i) (n!)/(r!)=n(n-1)(n-2)...(r+1) (ii) (n-r+1)*(n!)...
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- Prove that ((n),(r))+2((n),(r-1))+((n),(r-2))=((n+2),(r))
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- सिद्ध कीजिए : ((n-1)!)/((n-r-1)!)+r.((n-1)!)/((n-r)!)=(n!)/((n-r)!) ...
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