Home
Class 11
MATHS
In the binomial expansion of (a -b)^n, n...

In the binomial expansion of `(a -b)^n, nge5`, the sum of the 5th and 6th terms is zero. Then `a/b` equals :

A

`6/(n-5)`

B

`(n-5)/6`

C

`(n-4)/5`

D

`5/(n-4)`.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • BINOMIAL THEOREM

    MODERN PUBLICATION|Exercise EXERCISE|221 Videos

  • COMPLEX NUMBERS

    MODERN PUBLICATION|Exercise EXERCISE|291 Videos

Similar Questions

Explore conceptually related problems

In the binomial expansion of (a - b)^n , n ge 5 the sum of the 5th and 6th term is zero , then find a/b

In the binomial expansion of (1+x)^34 , the coefficients of the (2r-1)th and the (r-5)th terms are equal. Find r.

In the binomial expansion (a+b)^n , the coefficients of fourth and thirteenth terms are equal to each other. Find n.

In a binomial expansion (1 + x)^n is a positive integer, the coefficients of 5th, 6th and 7th terms are in A.P., then the value of n is :

Find the 6th term in the expansion of (x+3)^9 .

If the last tem in the binomial expansion of (2^(1/3)-1/(sqrt(2)))^n i s(1/(3^(5/3)))^(log_3 8) , then 5th term from the beginning is 210 b. 420 c. 105 d. none of these

Find the 4th term in the expansion of (x-2y)^12 .

The sum of the 4^(th) and 8^(th) term of an AP is 24 and the sum of the 6^(th) and 10^(th) terms is 44. Find the first three terms of the A.P

MODERN PUBLICATION-BINOMIAL THEOREM-EXERCISE
  1. The letters of the word COCHIN are permuted and all the permutations a...

    Text Solution

    |

  2. The sum of series .^(20)C0-^(20)C1+^(20)C2-^(20)C3+....+^(20)C 10 is

    Text Solution

    |

  3. In the binomial expansion of (a -b)^n, nge5, the sum of the 5th and 6t...

    Text Solution

    |

  4. How many different words can be formed by jumbling the letters of the ...

    Text Solution

    |

  5. The number of 7-digit integers, with sum of the digits equal to 10 and...

    Text Solution

    |

  6. The remainder left out when 8^(2n) - (62)^(2n +1) is divided by 9 , i...

    Text Solution

    |

  7. From 6 different novels and 5 different dictionaries, 4 novels and 1 d...

    Text Solution

    |

  8. There are two urns. Urn A has 4 distinct red balls and urn B has 5 dis...

    Text Solution

    |

  9. There are 10 points in a plane, out of these 6 are collinear. If N is ...

    Text Solution

    |

  10. For r = 0 ,1,2,…, 10 , letA(r), B(r) "and " C(r) denote respectively ,...

    Text Solution

    |

  11. The coefficient of x^(7) in the expansion of (1 - x- x^(2) + x^(3...

    Text Solution

    |

  12. Find the number of ways in which five identical balls can be distribut...

    Text Solution

    |

  13. A committee of 12 is to be formed from nine women and eight men. In ho...

    Text Solution

    |

  14. A committee of 12 is to be formed from nine women and eight men. In ho...

    Text Solution

    |

  15. A question paper consists of two sections having respectively 3 and 4 ...

    Text Solution

    |

  16. Let R =(5 sqrt5+11)^(2n+1) and and f=R-[R], where [ ] denotes the grea...

    Text Solution

    |

  17. Give that : C1+2C2 x+3C3 x^2+.....+2n. C(2n). x^(2n-1)=2n(1+x)^(2n-1)...

    Text Solution

    |

  18. Prove that underset(r=1)overset(k)sum(-3)^(r-1) .^(3n)C(2r-1) = 0 , wh...

    Text Solution

    |

  19. If a(0),a(1),a(2) ,…, a(2n) are the coefficients in the expansion ...

    Text Solution

    |

  20. Find the value of x for which the sixth term of : (sqrt(2^(log(10-3^x)...

    Text Solution

    |