Home
Class 11
MATHS
The first term of a G.P. is 1. The sum o...

The first term of a G.P. is 1. The sum of the third term and fifth term is 90. Find the C.R of the G.P

Promotional Banner

Topper's Solved these Questions

  • RELATIONS AND FUNCTIONS

    A N EXCEL PUBLICATION|Exercise QUESTION BANK|83 Videos

  • SETS

    A N EXCEL PUBLICATION|Exercise QUESTION BANK|268 Videos

Similar Questions

Explore conceptually related problems

The first term of a G.P is 1. The sum of the third and fifth terms is 90. Find the common ratio of the G.P.

If the first term of a G.P is 1 and the sum of 3^(rd) and 5^(th) terms is 90 then the positive common ratio of the G.P. is

The sum of the first 4 terms of an A.P. is 56. The sum of the last 4 terms is 112. If its first term is 11, then find the number of terms.

The third term of a GP is 4. Find the product of the first five terms.

The first term of an arithmetic sequence is 1 and the sum of the first four terms is 100 . Find the first four terms:

The first term of a G.P. is 3 and the common ratio is 2. Then the sum of first eight terms of the G.P. is

The sum of first three terms of a G.P. is 16 and the sum of the next three terms is 128. Determine the first term, the common ratio and the sum to n terms of the G.P.

The sum of the first three terms of a G. P is 16 and the sủm of the next three terms is 128. Determine the first term, common ratio and 'the sum to n térms of the G. P

The number of terms of an A.P. is even the sum of the odd terms is 24 sum of the even terms is 30 and the last term exceeds the first by 10 (1)/(2) then the number of terms in the series is

Suppose that a, ar, ar^2,ar^3,ar^4,ar^5 are the first 6 terms of a G.P Find the ratio of the sum of the first tree terms and the sum of first 6 terms

A N EXCEL PUBLICATION-SEQUENCES AND SERIES-QUESTION BANK
  1. If f is a function satisfying f(x+y)=f(x)f(y) for all x,yinN such that...

    Text Solution

    |

  2. The sum of some terms of a GP is 315 whose first term and the common r...

    Text Solution

    |

  3. The first term of a G.P. is 1. The sum of the third term and fifth ter...

    Text Solution

    |

  4. The sum of three numbers in G.P. is 56. If we subtract 1,7,21 from the...

    Text Solution

    |

  5. A G.P. consists of an even number of terms. If the sum of all the term...

    Text Solution

    |

  6. The sum of the first 4 terms of an A.P. is 56. The sum of the last 4 t...

    Text Solution

    |

  7. If (a+bx)/(a-bx)=(b+cx)/(b-cx)=(c+dx)/(c-dx)(xne0) then show that a,b,...

    Text Solution

    |

  8. Let S be the sum P the product and R the sum of reciprocals of n terms...

    Text Solution

    |

  9. The p^(th),q^(th)and r^(th) terms of an A.P. are a,b,c respectively. S...

    Text Solution

    |

  10. If a (1/b+1/c),b(1/c+1/a),c(1/a+1/b) are in A.P. prove that a,b,c are ...

    Text Solution

    |

  11. If a,b,c,d are in G.P. prove that (a^n+b^n),(b^n+c^n),(c^n+d^n) are in...

    Text Solution

    |

  12. If a and b are the roots of x^2-3x+p=0 and c,d are the roots of x^2-12...

    Text Solution

    |

  13. If a,b,c are in A.P. b,c,d are in G.P. and 1/c,1/d,1/e are in A.P. pro...

    Text Solution

    |

  14. Find sum of 5 + 55 + 555 + ... to n terms.

    Text Solution

    |

  15. Find the sum of the following series upto n terms 0.6+0.66+0.666+…

    Text Solution

    |

  16. Find the 20^(th) term of the series 2xx4+4xx6+6xx8+… to n terms

    Text Solution

    |

  17. Find the sum of the 1^(st) n terms of the series 3+7+13+21+31+…

    Text Solution

    |

  18. If S1.S2.S3 are the sum of the first n natural numbers, their squares ...

    Text Solution

    |

  19. Find the sum of the following series upto n terms (1^3)/1+(1^3+2^3)/(1...

    Text Solution

    |

  20. Show that (1 xx 2^2+2 xx 3^2+. .+n xx(n+1)^2)/(1^2 xx 2+2^2 xx 3+. .+n...

    Text Solution

    |