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Question

n+1Cn+1=? nN


A

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B

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C

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D

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Solution

The correct options are
A


B


C


D


n+1Cn+1=(n+1)!(n+1)!0!=1
Similarly, take each option and simplify them.
nCn=n!n!0!=1
n+2Cn+2=(n+2)!(n+2)!0!=1
n+3Cn+3=(n+3)!(n+3)!0!=1
n1Cn1=(n1)!(n1)!0!=1

We see all the options having same value.
All A, B, C and D are correct.


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