Home
Class 10
MATHS
In an AP : given a = 2, d = 8, S(n) =...

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

Text Solution

Verified by Experts

The correct Answer is:
`a_(5) = 34`
Promotional Banner

Topper's Solved these Questions

  • ARITHMETIC PROGRESSION

    SUBHASH PUBLICATION|Exercise Exericise 1.2|26 Videos

  • AREAS RELATED TO CIRCLES

    SUBHASH PUBLICATION|Exercise EXERCISE 5.3|18 Videos

  • CIRCLES

    SUBHASH PUBLICATION|Exercise EXERCISE 4.2|13 Videos

Similar Questions

Explore conceptually related problems

In an AP : given a = 3, n = 8, S_(n) = 192 , find d.

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

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

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

In an AP: (i) Given a=5, d=3, a_(n) = 50 , find n and S_(n) (ii) given a=7, a_(13) = 35 , find d and S_(13) . (iii) given a_(12) = 37, d=3 , find a and S_(12) (iv) given a_(3) = 15, S_(10) = 125 , find d and a_(10) (v) given a=2, d= 8, S_(n) = 90 , find n and a_(n) (vi) given a_(n) = 4, d=2, S_(n) = - 14 , find n and a. (vii) given l=28, S= 144, and there are total 9 terms, find a.

In an A.P: (i) Given a= 5, d=3, a_(n) = 50 , find n and S_(n) . (ii) Given a=7, a_(13) = 35 , find 'd' and S_(13) . (iii) Given a_(12) = 37 , d=3 , find a and S_(12) . (iv) Given a_(3) = 15, S_(10) = 125 , find 'd' and a_(10) . (v) Given d= 5, S_(9) = 75 , find 'a' and a_(9) . (vi) Given a=2, d=8, S_(n) = 90 , find 'n' and a_(n) . (vii) Given a=8, I=a_(n) = 62,S_(n) = 210 , find 'n' and 'd'. (viii) Given a_(n) = 4=I, d=2, S_(n) = -14 , find 'n' and 'a'. (ix) Given a=3, n=8, S_(n)= 192 , find 'd'. (x) Given I= 28, S_(n) = 144 , and there are a total 9 terms find 'a' .

In an AP: (i) given a=5, d=3, a_(n)=50 , find n and S_(n) . (ii) given a=7, a_(13)=35, find d and S_(13) (iii) given a_(12)=37, d=3 , find a and S_(12) (iv) given a_(3)=15, S_(10)=125 , find and a_(10) . (v) given d=5, S_(9)=75 and a and a_(9) . (vi) given a=2, d=8, S_(n)=90 , find n and a_(n) . (vii) given a=8, a_(n)=62, S_(n)=210 . find n and d. (viii) given a_(n)=4, d=2, S_(n) = -14, find n and a. (ix) given a_(n)=3, n=8, S_(n)=192, find d. (x) Given l=28, s=144 and there are total 9 terms find a.

In an AP : given d = 5, S_(9) = 75 , find a and a_(9) .

In an AP : given a_(3) = 15, S_(10) = 125 , find d and a_(10) .

In an AP : given a = 7, a_(13) = 35 , find d and S_(13) .

SUBHASH PUBLICATION-ARITHMETIC PROGRESSION-Exericise 1.3
  1. In an AP : given a(3) = 15, S(10) = 125, find d and a(10).

    Text Solution

    |

  2. In an AP : given d = 5, S(9) = 75, find a and a(9).

    Text Solution

    |

  3. In an AP : given a = 2, d = 8, S(n) = 90, find a and a(n).

    Text Solution

    |

  4. In an AP : given a = 8, a(n) = 62, S(n) = 210, find n and d.

    Text Solution

    |

  5. In an AP : given a(n) = 4, d = 2, S(n) = -14, find n and a.

    Text Solution

    |

  6. In an AP : given a = 3, n = 8, S(n) = 192, find d.

    Text Solution

    |

  7. In an AP : given l = 28, s = 144 and there are total 9 terms find a...

    Text Solution

    |

  8. How many terms of the A.P : 9, 17 25,… must be taken to give sum of 63...

    Text Solution

    |

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

    Text Solution

    |

  10. The first and the last terms of an A.P are 17 and 350 respectively. If...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  13. If the sum of first 7 terms of an A.P is 49 and that of 17 terms is 28...

    Text Solution

    |

  14. Show that a(1), a(2), ….,a(n),… form an A.P where an is defined as bel...

    Text Solution

    |

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

    Text Solution

    |

  16. A contract on construction job specific a penalty for delay of complet...

    Text Solution

    |

  17. A sum of Rs. 700 to be used to give seven cash prizes to students of a...

    Text Solution

    |

  18. In a scholl students thought of planting trees in and around the schoo...

    Text Solution

    |

  19. A spiral is made up of successive semicircles, with centres alternatel...

    Text Solution

    |

  20. 200 logs are stacked in the following manner : 20 logs in the bottom r...

    Text Solution

    |