Home
Class 11
MATHS
The ratio of sums ofn terms of two A.P'....

The ratio of sums ofn terms of two A.P'.s is (2n + 1) : (2n - 1). Prove that the ratio of their 12th terms will be 47 : 45.

Text Solution

Verified by Experts

N/a
Promotional Banner

Topper's Solved these Questions

  • SEQUENCE AND SERIES

    NAGEEN PRAKASHAN|Exercise Exercise 9D|11 Videos

  • SEQUENCE AND SERIES

    NAGEEN PRAKASHAN|Exercise Exercise 9E|12 Videos

  • SEQUENCE AND SERIES

    NAGEEN PRAKASHAN|Exercise Exercise 9B|17 Videos

  • RELATIONS AND FUNCTIONS

    NAGEEN PRAKASHAN|Exercise MISCELLANEOUS EXERCISE|12 Videos

  • SETS

    NAGEEN PRAKASHAN|Exercise MISC Exercise|16 Videos

Similar Questions

Explore conceptually related problems

The ratio of sums of n terms of two A.P'. is (7n + 1) : (4n + 27). Find the ratio of their 11th terms.

The ratio of the sum of n terms of two A.P.'s is (7n-1):(3n+11), find the ratio of their 10th terms.

If the ratio of sum to n terms of two A.P's is (5n+7): (3n+2), then the ratio of their 17th terms is

The ratio of the sum of n terms of two A.P.'s is (7n+1):(4n+27). Find the ratio of their mth terms.

The ratio of the sums of m terms and n terms of an A.P. is m^(2) : n^(2). Prove that the ratio of their mth and nth term will be (2m - 1) : (2n-1).

The ratio of the sum of n terms of two A.P.'s is (3n+1):(4n+3). Find the ratio of their mth terms.

The ratio of the sum of n terms of two A.Ps is (7n+1):(4n+27). Find the ratio of their m^(th) terms.

If the ratio of the sum to n terms of two A.P's is (5n+3):(3n+4), Then the ratio of their 17th terms is

NAGEEN PRAKASHAN-SEQUENCE AND SERIES-Exercise 9C
  1. The sum of 5 and 15 terms of an A.P. are equal. Find the sum of 20 ter...

    Text Solution

    |

  2. The sum of 20 and 28 terms of an A.P. are equal. Find the sum of 48 te...

    Text Solution

    |

  3. The pth and qth terms of an A.P. are(1)/(4)and(1)/(p) respectively. Pr...

    Text Solution

    |

  4. The sum of 15 terms of A.P. is zero. Its 4th term is 12. Find its 14th...

    Text Solution

    |

  5. The common difference, last term and sum of terms of an A.P. are 4, 31...

    Text Solution

    |

  6. The sum of m and n terms of an A.P. are n and m respectively. Prove t...

    Text Solution

    |

  7. In an A.P., if T(1) +T(5)+ T(10) +T(15)+ T(20) + T(24) = 225, find the...

    Text Solution

    |

  8. The nth term of an A.P. is (5n-1). Find the sum of its 'n' terms.

    Text Solution

    |

  9. The sum of 8 terms of an A.P. is -64 and sum of 17 terms is 289. Find ...

    Text Solution

    |

  10. The ratio of sums ofn terms of two A.P'.s is (2n + 1) : (2n - 1). Prov...

    Text Solution

    |

  11. The ratio of sums of n terms of two A.P'. is (7n + 1) : (4n + 27). Fin...

    Text Solution

    |

  12. The ratio of the sums of m terms and n terms of an A.P. is m^(2) : n^(...

    Text Solution

    |

  13. How many terms of the progression 54 + 51 + 48 +... has the sum 513 ? ...

    Text Solution

    |

  14. The pth and qth terms of an A.P. are x and y respectively. Prove that ...

    Text Solution

    |

  15. Show that the sum of an A.P. whose first term is a, the second term is...

    Text Solution

    |

  16. If the first term of an A.P. is 100 and sum of its first 6 terms is 5 ...

    Text Solution

    |

  17. The first term, last term and common difference of an A.P are respecti...

    Text Solution

    |

  18. Write the sum of first n even natural numbers.

    Text Solution

    |

  19. If Sn denotes the sum of n terms of an A.P. whose common difference is...

    Text Solution

    |

  20. The sums of n terms of three arithmetical progressions are S1, S2a n d...

    Text Solution

    |