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Q.

If 1n+1Cn   n+1nCn1   n+...+12C1   n+C0   n=102310 then n is equal to 

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a

7

b

8

c

6

d

9

answer is C.

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Detailed Solution

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01(1+x)n=01(C0   n+C1   nx+C2   nx2+.......+Cn   nxn)dx [(1+x)n+1n+1]01=[C0   nx+C1   nx22+C2   nx33+.......+Cn   nxn+1 n+1 ]01 2n+11n+1=C0   n+C1   n2+C2   n3+........+Cn   nn+1 =102310=210110 n=9

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