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Question

C20+C212+C223++C2nn+1=(2n+1)![(n+1)!)2

A
True
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B
False
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Solution

The correct option is A True

mr=0ncmrcra+1= mr=0nrrnCr(n+1)(n+1)(n+1)
mr=0mn+1(nCn+1n+1 nCr=nrn1Cr+1

2n+1Cm+1n+1(2n+1)!m!(n+1)!(n+1)

(2n+1)![(n+1)!]2


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