Home
Class 14
MATHS
IF the 10th term of the sequence a, a-b,...

IF the 10th term of the sequence a, a-b, a-2b,a-3b …….is 20 and the 20th term is 10 then the xth term of the series is

A

10-x

B

20-x

C

29-x

D

30-x

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • PROGRESSIONS

    DISHA PUBLICATION|Exercise TEST YOURSELF|15 Videos
  • PROGRESSIONS

    DISHA PUBLICATION|Exercise STANDARD LEVEL|27 Videos
  • PROFIT, LOSS AND DISCOUNT

    DISHA PUBLICATION|Exercise Test Yourself|15 Videos
  • QUADRATIC AND CUBIC EQUATIONS

    DISHA PUBLICATION|Exercise Test Yourself |15 Videos

Similar Questions

Explore conceptually related problems

What is the 10th term of the sequence 2,4 ,……….. ?

Find the 7th term of the sequence 2,10,50,250, ….

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

It the 10^(th) term of an A. P. is 1/20 and its 20^(th) term is 1/10, then the sum of its first 200 terms is :

The 6 th term of an AP is 20 and its 11 th term is 35. Find the 25 th term of the AP.

DISHA PUBLICATION-PROGRESSIONS-EXPERT LEVEL
  1. Suppose a, b and c are in Arithmetic Progression and a^2, b^2, and c^2...

    Text Solution

    |

  2. In a nuclear power plant a technician is allowed an interval of maximu...

    Text Solution

    |

  3. If sum(r = 1)^(oo) (1)/((2r - 1)^2) = (pi^2)/(8) then the value of sum...

    Text Solution

    |

  4. The interior angles of a polygon are in A.P. If the smallest angle is ...

    Text Solution

    |

  5. The sum of the squares of three numbers is 138, while the sum of their...

    Text Solution

    |

  6. If A is the sum of the squares of the first n natural numbers (where n...

    Text Solution

    |

  7. If a, b and c are distinct positive real numbers and a^2 + b^2 + c^2 ...

    Text Solution

    |

  8. IF the 10th term of the sequence a, a-b, a-2b,a-3b …….is 20 and the 20...

    Text Solution

    |

  9. Two numbers A and B are such that their GM is 20% lower than their AM....

    Text Solution

    |

  10. If a, b, c, d, e, f are in A.P., then e – c is equal to

    Text Solution

    |

  11. If (a2 a3)/(a1 a4) = (a2 + a3)/(a1 + a4) = 3 ((a2 - a3)/(a1 - a4)) th...

    Text Solution

    |

  12. A number of saplings are lying at a place by the side of a straight ro...

    Text Solution

    |

  13. Consider the expression ((a^2 + a + 1)(b^2 + b + 1) (c^2 + c + 1)...

    Text Solution

    |

  14. a, b, c, d and e are integers .If a, b, c, d and e are geometric progr...

    Text Solution

    |

  15. Suppose a, x, y, z and b are in A.P. where x + y + z = 15, and a, alph...

    Text Solution

    |

  16. If the arithmetic mean between a and b equals n times their geometric ...

    Text Solution

    |

  17. An arithmetic progression P consists of n terms. From the progression ...

    Text Solution

    |

  18. Rohit drew a rectangular grid of 529 cells, arranged in 23 rows and 23...

    Text Solution

    |

  19. An arithmetic series consists of 2n terms, and the first term equals t...

    Text Solution

    |

  20. If a = underset(55 "times")underbrace(111.....1), b= 1+10+10^(2)+10^(3...

    Text Solution

    |