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Binomial coefficients which are in decre...

Binomial coefficients which are in decreasing order are

A

`""^15C_5, ""^15C_6, ""^15C_7`

B

`""^15C_10, ""^15C_9, ""^15C_8`

C

`""^15C_6, ""^15C_7, ""^15C_8`

D

`""615C_7, ""^15C_6, ""^15C_5`

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The correct Answer is:
D
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AAKASH SERIES-BINOMIAL THEOREM-PRACTICE EXERCISE
  1. Coefficient of x^5 in (1+x +x^2 +x^3)^10 is

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  2. The coefficient of x^4 in the expansion of (1+x-2x^2)^7 is

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  3. Binomial coefficients which are in decreasing order are

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  4. Coefficient of x^3 in 1+(1+x) +(1 +x)^2 +…..+(1+x)^n is

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  5. Sum of the coefficients of (1+2x-4x^2)^(2003)

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  6. Sum of coefficients of terms of even powers of x in (1 + x + x^2 + x^...

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  7. Sum of coefficients of terms of odd powers of in (1+x - x^2 -x^3)^8is

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  8. If (1+x -2x^2)^8 =1 -a1x + a2x^2+……+a16x^16, then a2+a4+a6+……+a16 =

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  9. If (1+x-2x^2)^8 = 1 + a1x + a2x^2 + ……+ a16 x^16, then a1 +a3 + a5 + …...

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  10. (1+x)^25 = sum(r = 0)^(25) Cr x^r then C1 - C3 + C5 - C7 + ……-C25 =

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  11. The sum of the coefficients in the expansion of (1+x-3x^2)^(171) is

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  12. If the sum of all the binomial coefficients in (x+y)^n is 512 , then t...

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  13. The coefficient of x^(-n) in (1+x)^n (1+(1)/(x))^n is

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  14. If n is a positive integer then 2^(4n) - 15n - 1 is divisible by

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  15. Smaller of (19^10 + 20^10) and 21^10 is

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  16. 9^11 + 11^9 is divisible by

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  17. Integral part of (8 + 3sqrt7)^n is

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  18. If n = (sqrt2 +1)^6. Then the integer just greater than n is

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  19. 1.C0 + 3.C1+ 3^2.C2+….+3^n.Cn =

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  20. C0 + (C1)/(2) + (C2)/(2^2) + (C3)/(2^3)+…..+(Cn)/(2^n)=

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