Home
Class 14
MATHS
If the nth term of an A.P. is 4n-1 , fin...

If the nth term of an A.P. is 4n-1 , find the 30th term and the sum of first 30 terms.

A

119 and 1830

B

69 and 1665

C

119 and 1380

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • RATIO, PROPORTION & VARIATION

    QUANTUM CAT|Exercise QUESTION BANK|238 Videos
  • SET THEORY

    QUANTUM CAT|Exercise QUESTION BANK|81 Videos

Similar Questions

Explore conceptually related problems

If the nth term of an A.P. is (3-7n), find its 10th term.

If the sum of first 7 terms of an A.P. is 49 and that of 17 terms is 289, find the sum of first n terms.

if nth term of an AP is 3n+2 then find the sum n terms.

If the first term of an A.P. is 2 and the sum of the first five terms is equal to one fourth of the sum of the next five terms, find (i) the 20th term (ii) the sum of first 30 terms.

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

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

If the sum of first 7 terms of an A.P. is 49 and that of its 17 terms is 289, find the sum of first n terms of the A.P.

the A.P. nth term of an A.P. is given by (-4n+15). Find the sum of first 20 terms of A.P.

QUANTUM CAT-SEQUENCE, SERIES & PROGRESSIONS-QUESTION BANK
  1. (i) The sum of n terms of two arithmetic series are in the ratio of (7...

    Text Solution

    |

  2. The sum of three numbers in AP is 15 and sum of their squares is 93 fi...

    Text Solution

    |

  3. If the nth term of an A.P. is 4n-1 , find the 30th term and the sum of...

    Text Solution

    |

  4. The sum of n terms of a series is 3n^2+5n find the value of n if nth ...

    Text Solution

    |

  5. Find the number of terms of the A.P. 98,91,84,…must be taken to give a...

    Text Solution

    |

  6. What is the greatest possible sum of the A.P. 17,14,11,…

    Text Solution

    |

  7. What is the least possible sum of the A.P. -23,-19 , -15 , … :

    Text Solution

    |

  8. Find the sum of all odd numbers of four digits which are divisible by ...

    Text Solution

    |

  9. If a,b,c be the pth , qth and rth terms of an A.P., then p(b-c) + q(c-...

    Text Solution

    |

  10. If a,b,c be respectively the sum of first p,q,r terms of an A.P. then ...

    Text Solution

    |

  11. Divide 20 into four parts which are in A.P. and such that the product ...

    Text Solution

    |

  12. The sum of first p- terms terms of an A.P. is q and the sum of first q...

    Text Solution

    |

  13. Find the 6th term of the sequence 2,10,50,250,…..

    Text Solution

    |

  14. Find the sum of the first 6 terms of the G.P. 3, 9/2 , (27)/(4) ,(8...

    Text Solution

    |

  15. Find the sum of first five terms of the G.P 5,15,45…..

    Text Solution

    |

  16. Find the G.M of 3,9,27 which are in G.P

    Text Solution

    |

  17. Find the G.M of 3,6,24,48

    Text Solution

    |

  18. Insert 2 geometric means between 3 and 24

    Text Solution

    |

  19. If the product of five consecutive terms of G.P. is 1024, then find th...

    Text Solution

    |

  20. If the product of three terms of a G.P is 729 then find the G.M of the...

    Text Solution

    |