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If the coefficients of 2nd, 3rd and 4th terms in the expansion of`(1+x)^n` are in A.P., then find the value of n.

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A DAS GUPTA-Binomial Theorem for Positive Integrel Index-Exercise
  1. The sum of the rational terms in the expansion of (sqrt(2)+ root(5...

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  2. Write the middle term in the expansion of (x+1/x)^(10)dot

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  3. If the coefficients of 2nd, 3rd and 4th terms in the expansion of(1+x)...

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  4. If x^r occurs in the expansion of (x+1/x)^n then its coefficient is .

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  5. If the sum of the coefficients in the expansion of (a+b)^n is 4096, th...

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  6. The number of terms in the expansion of (1+x^(1/5))^55 which are free ...

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  7. If n is even then the coefficient of x in the expansion of (1+x)^n*(1-...

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  8. The sum of ""^21C0+""^21C1+""^21C2+...+""^21C10 is equal to .

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  9. The coefficient of x^(n) y^(n) in the expansion of [(1 + x)(1+y) (x...

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  10. The number of terms in the expansion of (1+2x+x^2)^n is :

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  11. The number of terms in the expansion of (1+7sqrt(2x))^9+(1-7sqrt(2x))^...

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  12. In the expansion of (x^(3) - (1)/(x^(2)))^(15) , the constant term,i...

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  13. The largest coefficient in the expansion of (1+x)^24 is

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  14. 3^(51) when divided by 8 leaves the remainder 2 2. 6 3. 3 4. 5 5. 1

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  15. The sum of the series ""^20C0+""^20C1+""^20C2+...+""^20C9 is =

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  16. The sum of the last eight coefficients in the expansion of (1 + x)^16 ...

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  17. If C(r) stands for ""^(n)C(r), then the sum of the series (2((n)/(2))!...

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  18. If pa n dq are ositive, then prove that the coefficients of x^pa n dx^...

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  19. The number of dissimilar terms in the expansion of (a+2b+3c)^8 is

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  20. In the expansion of (1+x)^(2m)(x/(1-x))^(-2m) the term independent of ...

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