Home
Class 11
MATHS
If the 2nd , 3nd and 4th terms in the ...

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

Promotional Banner

Topper's Solved these Questions

  • MATHEMATICAL REASONING

    JBD PUBLICATION|Exercise EXAMPLE|18 Videos

  • MODEL PAPER (1)

    JBD PUBLICATION|Exercise EXERCISE|36 Videos

Similar Questions

Explore conceptually related problems

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

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

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

Find 3rd term in the expansion of (3x-y^3/6)^4 .

Find the 6th term in the expansion of (3x^2-1/3x)^8

Find the third term in the expansion of : (x+2/5y)^4 .

Find 5th term in the expansion of (2x^2-1/3x)^11 .

The middle term in the expansion of (1 + x)^(2n) is :

Find the middle terms in the expansion of : (x/y+y/x)^(2n+1) .

JBD PUBLICATION-MODEL PAPER (9)-EXERCISE
  1. An angle alpha is divided into two parts such that ratio of the tangen...

    Text Solution

    |

  2. Express (5 - 3i)^3 in the form a + ib .

    Text Solution

    |

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

    Text Solution

    |

  4. Find the middle terms in the expansion of (3-x^(3)/6)^(7)

    Text Solution

    |

  5. Three vertices of parallelogram ABCD are A(3,-1,2), B(1,2,-4), C(-1,1,...

    Text Solution

    |

  6. Write down the truth value of the following: The number 19 is prime.

    Text Solution

    |

  7. Write down the truth value of the following: Every square is a rectang...

    Text Solution

    |

  8. Write the contra positive of the following statements: If you are born...

    Text Solution

    |

  9. Contrapositive of the statement If a number is divisible by 9. then it...

    Text Solution

    |

  10. Let A and B be two non empty sets, then show that AxxB=BxxA. If A=B

    Text Solution

    |

  11. Let A={1,2,3}, B={2,3,4} and C={4,5}.n verify that: Axx(BcupC)=(AxxB)c...

    Text Solution

    |

  12. Prove that sin7x + sin5x + sin3x + sinx = 4cosx cos2x sin4x

    Text Solution

    |

  13. Using Principle of Mathematical Induction, prove that : cos alpha cos ...

    Text Solution

    |

  14. Out of 18 points in a plane, no three are in the same straight line ex...

    Text Solution

    |

  15. Out of 18 points in a plane, no three are in the same straight line ex...

    Text Solution

    |

  16. If 1/(6!)+1/(7!)=x/(8!), find x

    Text Solution

    |

  17. Find the sum to n terms of the sequence 8, 88, 888, 8888,…

    Text Solution

    |

  18. Find the equation of the line passing through the point (-3,2) which m...

    Text Solution

    |

  19. Find the equation of the circle passing through the points.(2,-3) and...

    Text Solution

    |

  20. Evaluate: underset(xrarr2)lim (x^3-4x^2+4x)/(x^2-4).

    Text Solution

    |