Home
Class 11
MATHS
The sum of 20 and 28 terms of an A.P. ar...

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

Text Solution

Verified by Experts

The correct Answer is:
0
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 sum of 5 and 15 terms of an A.P. are equal. Find the sum of 20 terms of this A.P.

Find the sum of 20 terms of the A.P.1,4,7,10..

The sum of first 5 terms and first 15 terms of an A.P. are equal. Find the sum of its first 20 terms.

The sum of first 8 terms and first 24 terms of an A.P. are equal. Find the sum of its 32 terms.

If sum of first 20 terms of an A.P. is equal to sum of first 30 terms of the A.P. then sum of the first 50 terms of the A.P. is

If the sum of the first four terms of an AP is 40 and the sum of the first fourteen terms of an AP is 280. Find the sum of first n terms of the A.P.

Sum of n Terms of an A.P. | Examples

The sum of first 20 terms of an A.P. is one third of the sum of next 20 term. If first term is 1, find the sum of first 30 terms of this A.P.

NAGEEN PRAKASHAN-SEQUENCE AND SERIES-Exercise 9C
  1. (a) The sum of 'n' terms of a progression is n(n + 1). Prove that it i...

    Text Solution

    |

  2. The sum of 5 and 15 terms of an A.P. are equal. Find the sum of 20 ter...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |