Home
Class 11
MATHS
The first and last terms of an A.P. a...

The first and last terms of an A.P. are 1 and 11. If the sum of its terms is 36, then the number of terms will be (a) 5 (b) 6 (c) 7 (d) 8

A

5

B

6

C

7

D

8

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • SEQUENCES AND SERIES

    CBSE COMPLEMENTARY MATERIAL|Exercise SECTION-B(SHORT anwer type )|9 Videos

  • SEQUENCES AND SERIES

    CBSE COMPLEMENTARY MATERIAL|Exercise SECTION-C(SHORT anwer type )|34 Videos

  • SEQUENCES AND SERIES

    CBSE COMPLEMENTARY MATERIAL|Exercise SECTION-A(true/false)|6 Videos

  • REALATION AND FUNCTIONS

    CBSE COMPLEMENTARY MATERIAL|Exercise SHORT ANSWER TYPE QUESTIONS (4 MARKS)|29 Videos

  • SETS AND FUNCTIONS

    CBSE COMPLEMENTARY MATERIAL|Exercise LONG ANSWER TYPE QUESTIONS|21 Videos

Similar Questions

Explore conceptually related problems

The first and last terms of an A.P. are 1 and 7 . If the sum of its terms is 36 , then the number of terms will be

The first and last terms of an A.P.are 1 and 11 If the sum off its ter4msis 36 then the number if terms will be 5 b.8 c.6 d.7

4.If the first and last terms of an A.P.are 1 and 11 respectively and the sum of its terms is 30. find the number of terms in the A.P.

The first and last terms of an A.P. are - 7 and 233 and the sum of the A.P. is 9153. Find the number of terms in the A.P.:

The first term of an A.P. is 5 and the last term is 45. If the sum of all the terms in 400. the number of terms is

7^(th) term of an A.P. is 40. Then, the sum of first 13 terms is

First term of an A,P is -5 and its last term is 45 If the sum of these terms is 120 find the number of terms.

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

CBSE COMPLEMENTARY MATERIAL-SEQUENCES AND SERIES -SECTION-A(MCQ)
  1. The interior angles of a polygon are in A.P. the smallest angle is 120...

    Text Solution

    |

  2. alpha and beta are the roots of the equation x^(2)-3x+a=0 and gamma a...

    Text Solution

    |

  3. If A be the arithmetic mean between two numbers and S be the sum of n ...

    Text Solution

    |

  4. The mth term of an A.P. is (1)/(n) and nth term is (1)/(m). Its (mn)th...

    Text Solution

    |

  5. Insert n geometric means between a and b.

    Text Solution

    |

  6. What is the 15^(th) term of the series 3, 7, 13, 21, 31, 43, …….?

    Text Solution

    |

  7. If a ,b ,a n dc are in G.P. then prove that 1/(a^2-b^2)+1/(b^2)=1/(b^2...

    Text Solution

    |

  8. If the 10th term of a GP is 9 and 4th term is 4, then what is its 7th ...

    Text Solution

    |

  9. If the arithmetic and geometric means of two numbers are 10, 8 respect...

    Text Solution

    |

  10. What is the sum of numbers lying between 107 and 253, which are divisi...

    Text Solution

    |

  11. Find the sum of all two digit numbers which when divided by 4, yiel...

    Text Solution

    |

  12. The first and last terms of an A.P. are 1 and 11. If the sum of its...

    Text Solution

    |

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

    Text Solution

    |

  14. If the first second and last terms of an A.P. are a, b and 2a respecti...

    Text Solution

    |

  15. If pth, qth, rth terms of an A.P. are in G.P. then common ratio of ths...

    Text Solution

    |

  16. The n^(th) term of a GP is 128 and the sum of its n terms is 255. If i...

    Text Solution

    |

  17. If A be one A.M. and p ,q be two G.M. ' s between two numbers, then 2A...

    Text Solution

    |

  18. In a GP if the (m+n)th term is p and (m-n)th term is q then mth term i...

    Text Solution

    |

  19. If sumn=210, then sumn^2=

    Text Solution

    |

  20. The sum of 10 terms of the series sqrt2 + sqrt6 + sqrt18 +... is

    Text Solution

    |