Home
Class 12
MATHS
(1)/(2*5)+(1)/(5*8)+(1)/(8*11)+… upto n ...

`(1)/(2*5)+(1)/(5*8)+(1)/(8*11)+`… upto n terms =

A

`(n)/(6n+4)`

B

`(n)/(3n+7)`

C

`(n)/(4n+6)`

D

`(1)/(6n+4)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • KARNATAKA CET 2007

    KCET PREVIOUS YEAR PAPERS|Exercise MATHEMATICS|59 Videos

  • KARNATAKA CET 2009

    KCET PREVIOUS YEAR PAPERS|Exercise MATHEMATICS|60 Videos

Similar Questions

Explore conceptually related problems

Find the sum of the following Aps: (i) 2, 7, 12, …….., to 10 terms. (ii) -37, -33, -29, …….., to 12 terms. (iii) 0.6, 1.7, 2.8,….., to 100 terms (iv) (1)/(15), (1)/(12),(1)/(10) ,……,to 11 terms

If S_(n)=(1)/(6.11)+(1)/(11.16)+(1)/(16.21)+ ….. to n terms, then 6S_(n) equals

(1)/(1 . 3)+(1)/(3 . 5)+(1) /(5 . 7)+.. to n terms =

Prove that by using the principle of mathematical induction for all n in N : (1)/(2.5)+ (1)/(5.8) + (1)/(8.11)+ ...+(1)/((3n-1)(3n+2))= (n)/(6n+4)

If S denotes the sum to infinity and S_(n) , the sum of n terms of the series 1+( 1)/(2) +( 1)/( 4) + ( 1)/( 8 ) +"………….", such that S-S_(n) lt ( 1)/( 1000) , then the least value of n is :

Sum to n terms of the series (1)/(2 . 5) +(1)/(5 . 8)+(1)/(8 . 11)+..=

The value of (0.2) log _(sqrt(5)) ((1)/(4) +( 1)/( 8 ) +(1)/( 16)+"........" to oo ) is :

If the sum to n terms of the series (1)/(1*3*5*7)+(1)/(3*5*7*9)+(1)/(5*7*9*11)+"......" is (1)/(90)-(lambda)/(f(n)) , then find f(0), f(1) and f(lambda)

KCET PREVIOUS YEAR PAPERS-KARNATAKA CET 2008-MATHEMATICS
  1. R is a relation on N given by R={(x,y)|4x+3y=20} . Which of the fol...

    Text Solution

    |

  2. If log(10)7=0.8451 then the position of the first significant figure o...

    Text Solution

    |

  3. (1)/(2*5)+(1)/(5*8)+(1)/(8*11)+… upto n terms =

    Text Solution

    |

  4. The ten 's digit in 1!+4!+7!+10!+12!+13!+15!+16!+17! is divisible by

    Text Solution

    |

  5. If A=[{:(1" " 2),(3 " " 4):}] then A^(-1)=

    Text Solution

    |

  6. The set {-1,0,1} is not a multiplicative group because of the failure ...

    Text Solution

    |

  7. The angle of elevation of the top of a TV tower from three points A,B ...

    Text Solution

    |

  8. The angles A,B and C of a triangle ABC are in A.P. If b:c=sqrt(3):sqrt...

    Text Solution

    |

  9. sin(2sin^(-1)sqrt((63)/(65)))=

    Text Solution

    |

  10. A variable line (x)/(a)+(y)/(b)=1 is such that a+b=4. The locus of the...

    Text Solution

    |

  11. The point (5,-7) lines outside the circle

    Text Solution

    |

  12. If the circles x^(2)+y^(2)=9andx^(2)+y^(2)+2alphax+2y+1=0 touch each o...

    Text Solution

    |

  13. The locus of the midpoints of the line joining the focus and any point...

    Text Solution

    |

  14. The tangents drawn at the extremeties of a focal chord of the parabola...

    Text Solution

    |

  15. The equation (x^(2))/(2-lambda)+(y^(2))/(lambda-5)-1=0 represents an e...

    Text Solution

    |

  16. The equation to the normal to the hyperbola (x^(2))/(16)-(y^(2))/(9)=1...

    Text Solution

    |

  17. The converse of the contrapositive of the conditional pto~q is

    Text Solution

    |

  18. The perimeter of a certain sector of a circle is equal to the length o...

    Text Solution

    |

  19. The value of tan67(1^(@))/(2)+cot67(1^(@))/(2) is

    Text Solution

    |

  20. If e(1)ande(2) are the ecentricities of a hyperbola 3x^(2)-2y^(2)=25 a...

    Text Solution

    |