Home
Class 12
MATHS
If the sum of the first 2n terms of the ...

If the sum of the first 2n terms of the A.P. 2,5,8,`"……….."` is equal to the sum of the first n terms of the A.P. 57,59,61,`"…………"` then n equals `:`

A

10

B

12

C

11

D

13

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • SEQUENCES AND SERIES

    MODERN PUBLICATION|Exercise LATEST QUESTIONS|11 Videos

  • SEQUENCES AND SERIES

    MODERN PUBLICATION|Exercise Recent competitive Questions|5 Videos

  • SEQUENCES AND SERIES

    MODERN PUBLICATION|Exercise Recent competitive Questions|5 Videos

  • RELATIONS

    MODERN PUBLICATION|Exercise RCQS|6 Videos

  • SETS

    MODERN PUBLICATION|Exercise Recent Competitive Questions (RCQs)|6 Videos

Similar Questions

Explore conceptually related problems

If the sum of first p terms of an A.P is equal to the sum of the first q terms , then find the first (p+q) terms .

If the sum of first n terms of an A.P. is cn^(2) , then the sum of squares of these n terms is :

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

The sum of the third and the seventh terms of an A.P. is 6 and the product is 8. Find the sum of first sixteen terms of the A.P.

The sum of the third and seventh terms of an A.P is 6 and their product is 8 find the sum of first sixteen terms of the A.P.

The sum of the third and seventh terms of an AP is 6 and their product is 8 find the sum of first sixteen terms of the A.P.

The sum of first 2n terms of an AP is alpha . and the sum of next n terms is beta, its common difference is

7th term of an A.P. is 40. then the sum of the first 13 terms is

If 2 is the sum to infinity of a G.P, whose first element is 1, then the sum of the first n terms is

MODERN PUBLICATION-SEQUENCES AND SERIES -MCQ ( Level-II)
  1. The sides a,b,c of Delta ABC are in G.P. , where log a - log 2b, log ...

    Text Solution

    |

  2. Let alpha, beta be the roots of x^(2) -x + p = 0 and gamma , delta b...

    Text Solution

    |

  3. If the sum of the first 2n terms of the A.P. 2,5,8,"……….." is equal to...

    Text Solution

    |

  4. The first term of a G. P. is 1. The sum of the third and fifth terms i...

    Text Solution

    |

  5. Suppose a,b,c are in A.P. and a^(2) , b^(2) , c^(2) are in G.P. If a ...

    Text Solution

    |

  6. If sum of the roots of the quadratic equation ax^(2) + bx+c = 0 is equ...

    Text Solution

    |

  7. If f(x) is a polynomial function of second degree. IF f(1) = f(-1) and...

    Text Solution

    |

  8. The sum of first n terms of the series 1^(2) + 2.2^(2) +3^(2) + 2. 4...

    Text Solution

    |

  9. If s= sum(n=0)^(oo) a^(n) , y = sum(n=0)^(oo) b^(n) , z= sum (n=0)^(oo...

    Text Solution

    |

  10. If alpha, beta are roots of ax^(2) + bx + c =0 , a cancel(=) 0 and alp...

    Text Solution

    |

  11. Let a(1) , a(2) , a(3) , "……………" be terms of an A.P. If (a(1) + a(2) +...

    Text Solution

    |

  12. If a(r ) gt 0, r in N and a(1), a(2) , a(3) ,"……..",a(2n) are in A.P....

    Text Solution

    |

  13. Let x,y,z be three positive prime numbers. The progression in which sq...

    Text Solution

    |

  14. If x = sum(n=0)^(oo) a^(n) .,y=sum(n=0)^(oo) b^(n) , z = sum(n=0)^(oo)...

    Text Solution

    |

  15. underset("n-digits")((666"……"6))^(2) +underset("n-digits") (( 888"…" 8...

    Text Solution

    |

  16. If sum(r=1)^(n) t(r ) = sum(k=1)^(n) sum(j=1)^(k) sum(i=1)^(j) 2, then...

    Text Solution

    |

  17. The odd numbers are divides as follows : {:(,,1,3,,),(,5,7,9,11,),(1...

    Text Solution

    |

  18. If x(1), x(2), x(3) as well as y(1) , y (2) , y (3) are in G.P. with t...

    Text Solution

    |

  19. If a(1) , a(2), "……………" a(n) are in H.P., then the expression a(1) a(2...

    Text Solution

    |

  20. In a geometric progression consisting of positive terms, each term equ...

    Text Solution

    |