Grade 11Algebra
Prove that: nCn + n+1Cn + n+2Cn + … + n+kCn = n+k+1Cn+1
1 Answer
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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.
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