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If the 2nd ,3rd and 4th terms in the exp...

If the 2nd ,3rd and 4th terms in the expansion of `(x+a)^(n)` are 240 ,720and 1080 respectively , find x a and n .

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The correct Answer is:
x = 2 , a = 3 and n = 5
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CHHAYA PUBLICATION-BINOMIAL THEOREM -EXERCISE ( Long answer Type Questions )
  1. The coefficients of 5th ,6th and 7th terms in the expansion of (1+x)^...

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  2. If the coefficients if three successive terms in the expansion of (1+...

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  3. If the 2nd ,3rd and 4th terms in the expansion of (x+a)^(n) are 240 ,7...

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  4. The three successive of the consecutive three terms in the expansion o...

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  5. If the coefficients of the consicutive four terms in the expansion of ...

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  6. If n be a positive integer and if the 3rd , 4th , 5th and 6th terms in...

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  7. Find the coefficient of x^(r) in the following expression : (x+n)^(...

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  8. If the first three terms in the expansion of (1+x)^(n) are in A .P . ,...

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  9. If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+.....+C(n)x^(n) then show : C(1)...

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  10. If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+.....+C(n)x^(n) then show : C(1)...

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  11. If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+.....+C(n)x^(n) then show : (C(0...

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  12. If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+.....+C(n)x^(n) then show : (C(0...

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  13. If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+.....+C(n)x^(n) then show : C(0)...

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  14. If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+.....+C(n)x^(n) then show : C(0)...

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  15. If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+.....+C(n)x^(n) then show : (C(1...

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  16. If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+.....+C(n)x^(n) then show : (C(0...

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  17. If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+.....+C(n)x^(n) then show : (C(1)...

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  18. If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+.....+C(n)x^(n) then show : C(0)...

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  19. If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+.....+C(n)x^(n) then show : C(0)...

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  20. If (1+x)^(n)=C(0)+C(1)x+C(2)x^(2)+.....+C(n)x^(n) then show :

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