Home
Class 10
MATHS
If the sum of n terms of an A.P. i...

If the sum of `n` terms of an A.P. is `2n^2+5n` , then its `n t h` term is `4n-3` (b) `3n-4` (c) `4n+3` (d) `3n+4`

Promotional Banner

Topper's Solved these Questions

  • AREAS RELATED TO CIRCLES

    RD SHARMA|Exercise All Questions|251 Videos

  • CIRCLES

    RD SHARMA|Exercise All Questions|131 Videos

Similar Questions

Explore conceptually related problems

If the sum of n terms of an A.P.is 2n^(2)+3n then write its nth term.

If the sum of n terms of an A.P.is 2n^(2)+5n then its nth term is 4n-3 b.3n-4 c.4n3 d.3n+4

If the sum of first n terms of an A.P. is 3n^(2)-2n , then its 19th term is

If the sum of n terms of an A.P is 2n+3n^(2) , find the r^(th) term

The sum of n terms of an AP is 3n^2+5n ,then find its 16th term.

The sum of n terms of an A.P. is n^(2) + 3n . Find its 20th term.

If for every n in N , sum to n terms of an A.P. is 5n^(2)+7n then is 10th term is

If the sum of n terms of an A.P is (4n^(2)-3n)/(4) then ,n^(th) term of the A.P

If sum of n terms of an A.P. is 4n^(2) +7n , find the 15^(th) term.

RD SHARMA-ARITHMETIC PROGRESSIONS-All Questions
  1. The first and last terms of an A.P. are 1 and 11. If the sum of its...

    Text Solution

    |

  2. If the sum of n terms of an A.P., is 3n^2+5n then which of its terms i...

    Text Solution

    |

  3. If the sum of n terms of an A.P. is 2n^2+5n , then its n t h ter...

    Text Solution

    |

  4. If the sum of three consecutive terms of an increasing A.P. is 51 a...

    Text Solution

    |

  5. If four numbers in A.P. are such that their sum is 50 and the great...

    Text Solution

    |

  6. Let Sn denote the sum of n terms of an AP whose first term is a. If co...

    Text Solution

    |

  7. If the first, second and last term of an A.P. are a ,\ b and 2a res...

    Text Solution

    |

  8. If S1 is the sum of an AP of 'n' odd number of terms and S2 be the sum...

    Text Solution

    |

  9. If in an A.P., Sn=n^2p and Sm=m^2p , where Sr denotes the sum of...

    Text Solution

    |

  10. Let Sn denotes the sum of the first of n terms of A.P. and S(2n)=3Sn ...

    Text Solution

    |

  11. in an AP , Sp=q , Sq=p and Sr denotes the sum of the first r terms. Th...

    Text Solution

    |

  12. If Sr denotes the sum of the first r terms of an A.P. Then, S(3n...

    Text Solution

    |

  13. If the first term of an A.P. is 2 and common difference is 4, then ...

    Text Solution

    |

  14. The number of terms of the A.P. 3,\ 7,\ 11 ,\ 15 ,\ ddot to be take...

    Text Solution

    |

  15. Sum of n terms of the series sqrt(2)+sqrt(8)+sqrt(18)+sqrt(32)+\ dd...

    Text Solution

    |

  16. The 9t h term of an A.P. is 449 and 449th term is 9. The term which...

    Text Solution

    |

  17. The n t h term of an A.P., the sum of whose n terms is Sn , is Sn+S...

    Text Solution

    |

  18. The common difference of an A.P., the sum of whose n terms is Sn , i...

    Text Solution

    |

  19. If the sums of n terms of two arithmetic progressions are in the...

    Text Solution

    |

  20. If Sn denote the sum of n terms of an A.P. with first term a and...

    Text Solution

    |