Home
Class 10
MATHS
In an AP, given an=4, d=2, Sn=-14 find n...

In an AP, given `a_n=4, d=2, S_n=-14` find `n` and `a`

Text Solution

Verified by Experts

The correct Answer is:
`-8`
Promotional Banner

Topper's Solved these Questions

  • ARITHMETIC PROGRESSIONS

    OSWAL PUBLICATION|Exercise NCERT CORNER (EXERCISE-5.4)|4 Videos

  • ARITHMETIC PROGRESSIONS

    OSWAL PUBLICATION|Exercise NCERT EXAMPLAR (EXERCISE-5.1)|19 Videos

  • ARITHMETIC PROGRESSIONS

    OSWAL PUBLICATION|Exercise NCERT CORNER (EXERCISE-5.2)|26 Videos

  • ARITHMETIC PROGRESSION

    OSWAL PUBLICATION|Exercise SELF -ASSESSMENT |22 Videos

  • C.B.S.E 2020 CLASS -X (DELHI)

    OSWAL PUBLICATION|Exercise DELHI SET -III ( SECTION- D ) |1 Videos

Similar Questions

Explore conceptually related problems

In an A.P: given a_(n) = 4 , d = 2 , S_(n) = -14 , find n and a .

In an AP: given a=5,d=3,a_(n)=50, find n and S_(n)

In an A.P: given a = 2 , d = 8 , S_(n)= 90 , find n and a_(n) .

In an A.P. : (i) given a=5, d=3, a_(n)=50 , find n and S_(n) . (ii) given a=2, d=8, S_(n)=90 , find n and a_(n) . (iii) given a=3, n=8, S_(n)=192 , find d. (iv) given l=28, S=144, n=9 , find a.

given a=2,d=8,S_(n)=90, find n and a_(n)

In an A.P: given a = 5 , d = 3, a_(n) = 50 , find n and S_(n)

In an AP,given a=5,d=3,a_(n)=50. Find n and S_(n)

In an AP: (vii) given a =8,a_(n)=62,S_(n)=210 find n and d

In an A.P: given a = 3 , n = 8 ,S= 192 ,find d .

In an A. P. : given a = 2, d = 8, S _(n) = 90, find n and a _(n)

OSWAL PUBLICATION-ARITHMETIC PROGRESSIONS -NCERT CORNER (EXERCISE-5.3)
  1. In an A. P. : given a = 2, d = 8, S (n) = 90, find n and a (n)

    Text Solution

    |

  2. In an A. P. : given a = 8, a (n) = 62, S (n) = 210, find n and d.

    Text Solution

    |

  3. In an AP, given an=4, d=2, Sn=-14 find n and a

    Text Solution

    |

  4. In an A. P. : given a = 3, n = 8, S = 192, find d.

    Text Solution

    |

  5. In an A. P. : given l = 28, S = 144, and there are total 9 terms Fin...

    Text Solution

    |

  6. How many terms of the AP: 9, 17, 25, . . . must be taken to give a sum...

    Text Solution

    |

  7. The first term of an A.P. is 5, the last term is 45 and the sum is 400...

    Text Solution

    |

  8. The first and the last terms of an A.P. are 17 and 350 respectively. I...

    Text Solution

    |

  9. Find the sum of first 22 terms of an A.P. in which d = 7 and 22 nd ter...

    Text Solution

    |

  10. Find the sum of first 51 terms of an A.P. whose second and third terms...

    Text Solution

    |

  11. If the sum of first 7 terms of an A.P. is 49 and that of 17 terms is 2...

    Text Solution

    |

  12. Show that a (1), a (2), …., a (n),… from an A.P. where a (n) is define...

    Text Solution

    |

  13. Show that a (1), a (2), …., a (n),… from an A.P. where a (n) is define...

    Text Solution

    |

  14. If the sum of the first n terms of an A.P. is 4n - n ^(2), what is the...

    Text Solution

    |

  15. The sum of first 40 positive integers divisible by 6 is

    Text Solution

    |

  16. Find the sum of the first 15 multiples of 8.

    Text Solution

    |

  17. Find the sum of the odd numbers between 0 and 50.

    Text Solution

    |

  18. A contract on construction job specifies a penalty for delay of com...

    Text Solution

    |

  19. A sum of Rs 700 is to be used to give seven cash prizes to students...

    Text Solution

    |

  20. In a school, students thought of planting trees in and around the scho...

    Text Solution

    |