Home
Class 11
MATHS
If the sum of 1st n term of an AP is n(3...

If the sum of 1st n term of an AP is n(3n + 5), find its 10th term

Promotional Banner

Topper's Solved these Questions

  • MODEL QUESTION PAPERS-SET 8

    UNITED BOOK HOUSE|Exercise EXERCISE|50 Videos

  • Model Test Set - 1

    UNITED BOOK HOUSE|Exercise Exercise|43 Videos

Similar Questions

Explore conceptually related problems

If the sum of n terms of an A.P. is 3n^2 + 5n and its m^("th") term is 164, find the value of m .

If the sum of 1st M terms of an AP is m. and the sum of 1st N terms is n, show that- the 1st term of this AP is (mN(N-1)-nM(M-1))/(MN(N-M))

If the sum of the first n terms of an AP is 4n-n^(2) , what is the first term (note that the first term is S_(1) )? What is the sum of first two terms? What is the second term? Similarly, find the 3rd, the 10th and the nth terms

If the sum of the first 14 terms of an AP is 1050 and its first term is 10 , find the 20th term .

If the sum of the first 14 terms of an AP is 1050 and its first term is 10, find the 20th term.

If the sum of the first n terms of an A.P. be n^(2)+3n , which term of it has the value 162 ?

If the sum of first 7 terms of an AP is 49 and that of 17 terms is 289, find the sum of first n terms.

If the sum of sirst n terms of a G.P is p.sum of its first 2n terms is 3p,Prove that the sum of its first 3n terms is 7p.

If the sum of the n term of an AP is n^2 + 2n . which, term will be 201?

If the sum of first n terms of an A.P. series is n^(2) +2n, then the term of the series having value 201 is-

UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 9-EXERCISE
  1. In a plane, if n number.of parallel lines intersect the P numbers of p...

    Text Solution

    |

  2. In the expansion of (3x^2-1/x^3)^10:find the 7th term.

    Text Solution

    |

  3. If the sum of 1st n term of an AP is n(3n + 5), find its 10th term

    Text Solution

    |

  4. If the three straight lines y = 3x- 1, 2y = x + 3 and 3y - 4 = mx are ...

    Text Solution

    |

  5. Find the co-ordinate of the image of (3, 2, -4) on xy plane.

    Text Solution

    |

  6. If S=at^2+bt+c find [ds/dt]'t=2

    Text Solution

    |

  7. If f(x) =1/x , then show thatlim(hrarr0)(f(2+h)-f(2))/h=-1/4

    Text Solution

    |

  8. Find the probability of 53 Sunday in a Leap year ?

    Text Solution

    |

  9. Show that the mean deviation with respect to Arithmetic mean is zero

    Text Solution

    |

  10. If f(x)=1/x^2,show that f(x)-f(x+1)=(2x+1)/(x^2(x+1)^2)and hence again...

    Text Solution

    |

  11. If acosphi=b costheta,show that a tantheta+b tanphi=(a+b)tan((theta+ph...

    Text Solution

    |

  12. Show that tan20^@tan40^@tan80^@=sqrt3

    Text Solution

    |

  13. Prove the following by the method of mathematical induction. :n^3+(n+1...

    Text Solution

    |

  14. If the sum of 1+2r+3r^2+4r^3+...oo9/16,find the value of r.

    Text Solution

    |

  15. In how many ways can the crew of an 8-oared boat be arranged if 2 of t...

    Text Solution

    |

  16. Express(sqrt3-i)/(1-sqrt3i)in modulus amplitude form

    Text Solution

    |

  17. In /\XYZthe equation of the perpendicularbisector of XY and XZ arc x-y...

    Text Solution

    |

  18. Find the co-ordinate of the image of the point (-3, -1), with respect ...

    Text Solution

    |

  19. Show that the circle with the portion of the line 3x + 4y = 12 interce...

    Text Solution

    |

  20. Find the equation to the locus of a point whose distance from YZ plane...

    Text Solution

    |