Home
Class 10
MATHS
If the n^(th) term of the A.P. -1,4,9,14...

If the `n^(th)` term of the A.P. -1,4,9,14, … is 129, find the value of n.

Promotional Banner

Topper's Solved these Questions

  • 2020 QUESTION PAPER (1)

    AGRAWAL PUBLICATION|Exercise EXERCISE|33 Videos
  • CIRCLES

    AGRAWAL PUBLICATION|Exercise EXAMPLE|51 Videos

Similar Questions

Explore conceptually related problems

If the n^(th) term of an A.P. - 1, 4, 9, 14 , is 129. Find the value of n.

Find the 11th term of the A.P. 4, 9, 14, ….

The n^(th) term of the A.P. a, 3a, 5a, …. Is

Find the 25th term of the A.P. 6, 10, 14, ...

If the n^(th) term of an A.P. is 7-3n, find the sum of twenty five terms.

If the n^(th) term of the A.P.9,7,5,... is same as the n^(th) term of the A.P.15,12,12,... find n.

If the n^(th) term of an A.P.is (2n+1), find the sum of first n terms of the A.P.

The 10th term and the 18th term of an A.P. are 25 and 41 respectively, then find 38th term of that A.P. Similarly if nth term is 99, find the value of n.

Find the (i) 10th term of the A.P. 4,9,14,……. (ii) 7th term of the A.P. 6,10,14,………..

If the n^(th) term of an A.P is (5n-2) ,find its 19^(th) term

AGRAWAL PUBLICATION-ARITHMETIC PROGRESSIONS-EXAMPLE
  1. In an AP, if the common difference (d) = -4, and the seventh term (a7)...

    Text Solution

    |

  2. Write the n^(th) term of the A.P. 1/m ,(1+m)/m, (1+2m)/m.

    Text Solution

    |

  3. If the n^(th) term of the A.P. -1,4,9,14, … is 129, find the value of ...

    Text Solution

    |

  4. Find the 9th term from the end (towards the first term) of the A.P. 5,...

    Text Solution

    |

  5. For the AP: -3,-7,-11, ……, can we directly find a(30) - a(20) without ...

    Text Solution

    |

  6. If the first three terms of an A.P are b, c abd 2b, then find the rati...

    Text Solution

    |

  7. What is the common difference of an A,P in which a(21) - a7 =84?

    Text Solution

    |

  8. For what value of k will k+9, 2k -1 and 2k+7 are the consecutive terms...

    Text Solution

    |

  9. Find the 16^(th)term of the AP,2,7,12,17,……

    Text Solution

    |

  10. Find the mean of first eleven natural numbers.

    Text Solution

    |

  11. Show that (a+b)^2, (a^2 + b^2) and (a+b)^2 are in AP.

    Text Solution

    |

  12. If the 17^(th) term of an A.P exceeds its 10^(th) term by 7, Find the ...

    Text Solution

    |

  13. Hoe many multiples of 4 die between 10 and 205?

    Text Solution

    |

  14. Determine the A.P. whose third term is 16 and 7^(th) term exceeds the ...

    Text Solution

    |

  15. Two AP's have the same common difference.The first term of one AP is 2...

    Text Solution

    |

  16. Which term of the AP 3,15,27, 39,…. Will be 120 more than its 21st ter...

    Text Solution

    |

  17. If Sn the sum of first n terms of an AP is given by Sn =3n^2-4n, find ...

    Text Solution

    |

  18. Find the sum of first 8 multiples of 3.

    Text Solution

    |

  19. If seven times the 7^(th) term of an A.P is equal to eleven times the ...

    Text Solution

    |

  20. The 10^(th) term of an A.P is -4 and its 22^(nd) term is (-16) . Find ...

    Text Solution

    |