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Q.

C0+C12+C23+..+Cnn+1=

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a

2n+1-1n+1

b

2n-1n+1

c

2nn+1

d

1n+1

answer is A.

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Detailed Solution

C0+C12x+C23x2+…+Cnn+1xn=(1+x)n+1−1(n+1)x⇒C0+C12+C23+…+Cnn+1=2n+1−1n+1.
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