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If (1)/(1!(n-1)!) + (1)/(3!(n-3)!) + (1)...

If `(1)/(1!(n-1)!) + (1)/(3!(n-3)!) + (1)/(5!(n-5)!) +…. = `

A

`(2^n)/((n+1)!)`

B

`(2^(n-1))/(n!)`

C

`(2^(n+1))/(n!)`

D

`(2^n)/((n+2)!)`

Text Solution

Verified by Experts

The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-BINOMIAL THEOREM-EXERCISE 1B (BINOMIAL COEFFICIENTS)
  1. C0 C1+C1 C2 + C2 C3+…+ C(n-1) Cn=

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  2. If (C0 + C1) (C1+C2)…(C(n-1) + Cn)=k C0 C1 C2… Cn then k=

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  3. If (1)/(1!(n-1)!) + (1)/(3!(n-3)!) + (1)/(5!(n-5)!) +…. =

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  4. sum(r=0)^(n) (""^n Cr)^2 =

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  5. C0^2+3.C1^2+5. C2^2+….+(2n+1) .Cn^2=

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  6. If Cr denotes the binomial coefficient ""^n Cr then (-1) C0^2 + 2C1^2+...

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  7. If n is odd then C0^2 - C1^2+C2^2-…....+(-1)^n Cn^2=

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  8. If n is even then C0^2 - C1^2+C2^2-…....+(-1)^n Cn^2=

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  9. ""^((2n + 1))C0 - ""^((2n+ 1))C1 + ""^((2n + 1))C2 - ……+""^((2n + 1))C...

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  10. Prove that (""^(2n)C(0))^(2)-(""^(2n)C(1))^(2)+(""^(2n)C(2))-(""^(2n...

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  11. C1//1-C2//2+C3//3-C4//4+…+(-1)^(n-1) Cn//n=

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  12. C0 - 2^3 . C1 +3^2. C2 - …. + (-1)^n (n+1)^2 . (Cn)=

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  13. Use the identity (1+x)^(m)(1+x)^(n)=(1+x)^(m+n) to prove Vandermonde's...

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  14. C0 - C2 + C4 - C6 +….....

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  15. C1 - C3 + C5 - C7 + …...

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  16. The term independent of x in (1+x)^n (1+(1)/(x))^n is

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  17. If a(n)=sum(r=0)^(n)(1)/(""^(n)C(r)) then sum(r=0)^(n)(r)/(""^(n)C(r))...

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  18. If x+y=1, then sum(r=6)^(n) r ^n Cr x^r . Y^(n-r)=

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  19. If x+y=1 then sum(r=0)^(n) r^2. ^(n) Cr x^r .y^(n-r)=

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  20. the value of (1)/((81)^n)-^(2n) C1. ((10)^2)/((81)^n)+ ^(2n) C1 ((10)^...

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