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Grade: 11
        Prove that: nCn + n+1Cn + n+2Cn + … + n+kCn = n+k+1Cn+1
one year ago

Answers : (1)

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137 Points
							nCn is also be written as n+1Cn+1 and now u can apply the property that NCr+NCr-1=(N+1)Cr, so by applying this u Will easily get the answer.
						
one year ago
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