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If sum(r=0)^(10)((r+2)/(r+1))^^n Cr=(2^8...

If `sum_(r=0)^(10)((r+2)/(r+1))^^n C_r=(2^8-1)/6` , then `n` is `8` b. `4` c. `6` d. `5`

A

8

B

4

C

6

D

5

Text Solution

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The correct Answer is:
D
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DISHA PUBLICATION-BINOMIAL THEOREM -EXERCISE-1 (CONCEPT BUILDER )
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  12. Find the number of nonzero terms in the expansion of (1+3sqrt(2)x)^9+(...

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  13. If (+x)^n=sum(r=0)^n ar x^r&br=1+(ar)/(a(r-1))&prod(r=1)^n br=((101)^...

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  15. If z = 1/3 + (1.3)/(3.6) + (1.3.5)/(3.6.9) + .... then

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  16. If the sum of the coefficients in the expansion of (1 + 2x)^(n) is...

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  17. The coefficient of the term independent of x in the exampansion of ((x...

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  18. If the coefficient of (r +1)^(th) term in the expansion of (1 +x)^...

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  19. In the binomial expansion of (a - b)^(n) , n ge 5 , the sum of the ...

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  20. If r^(th)term in the expansion of (x/3-2/x^2)^(10)contains x^4, then f...

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