Home
Class 11
MATHS
For an A.P a = 20 and l = 97 then S(20)=...

For an A.P a = 20 and l = 97 then `S_(20)= ..........`

Text Solution

Verified by Experts

The correct Answer is:
1170
Promotional Banner

Topper's Solved these Questions

  • OBJECTIVE SECTION AS PER NEW PAPER SCHEME

    KUMAR PRAKASHAN|Exercise Probability (True/False Statement)|10 Videos

  • MATHEMATICAL REASONING

    KUMAR PRAKASHAN|Exercise QUESTION OF MODULE (Knowledge Test:)|2 Videos

  • PERMUTATIONS AND COMBINATIONS

    KUMAR PRAKASHAN|Exercise PRACTICE WORK |40 Videos

Similar Questions

Explore conceptually related problems

For an A.P. If S_(30)= 1635 and a_(30)= 98 then find A.P.

For an A.P., S_(1)=6 and S_(7)= 105 . Prove that S_(n): S_(n-3) = (n+ 3): (n-3)

If in an AP, S_(n)= q n^(2) and S_(m)= qm^(2) , where S_(r ) denotes the sum of r terms of the AP, then S_(q) equals to,

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

If ((20) ,(r))=((20),(r+2)) then ((r),(2))=........ .

Four numbers are in A.P. If their sum is 20 and the sum of their squares is 120, then the middle terms are

S_(n) is the sum of n terms of an A.P. If S_(2n)= 3S_(n) then prove that (S_(3n))/(S_(n))= 6

If P(A cap B)= (7)/(10) and P(B)= (17)/(20) then P(A//B) equals = ………

All the terms of an AP are natural numbers and the sum of the first 20 terms is greater than 1072 and less than 1162.If the sixth term is 32, then

KUMAR PRAKASHAN-OBJECTIVE SECTION AS PER NEW PAPER SCHEME -Sequence and Series (Fill in the blanks )
  1. For arithmetic sequence a = 2 and a5 = 14 then d = ........

    Text Solution

    |

  2. For arithmetic sequence a(8) =23 common difference d = 5 then a = .......

    Text Solution

    |

  3. For arithmetic sequence

    Text Solution

    |

  4. For an A.P a = 20 and l = 97 then S(20)= ..........

    Text Solution

    |

  5. If a, b, and c are in A.P then (a + 2b -c) . ( 2b +c-a) . (c+a-b) = .....

    Text Solution

    |

  6. For arithmetic sequence a(1),a(2),a3 ........ If a(1)+a(5)+a(10)+a(15)...

    Text Solution

    |

  7. If 25, x - 6 and x - 12 are in G.P then x = .......... or ......... .

    Text Solution

    |

  8. Third term of G.P. is 3 then product of its first 5 terms is ............

    Text Solution

    |

  9. Eighth term of G.P is 128 and common ratio is r = 2 then product of fi...

    Text Solution

    |

  10. For an G.P. a = 16 and fifth term is 81 then common ratio ........

    Text Solution

    |

  11. How many terms of G.P. 3, 3^2, 3^3, … are needed to give the sum 120?

    Text Solution

    |

  12. For an geometric seq. (5)/2,(5)/(4),(5)/8.......a(n) = ............. .

    Text Solution

    |

  13. A1 and A2 are arithmetic mean between a and b also G1 and G2 are geome...

    Text Solution

    |

  14. For numbers 6 and 24, A - G = ...... .

    Text Solution

    |

  15. 10 is Geometric mean between 5 and x then x = ......... Where x in R^(...

    Text Solution

    |

  16. 12 is arithmetic mean between x and 22 then x = ............

    Text Solution

    |

  17. 10 arithmetic mean between a and b are A(1),A(2),A(3).........A(10) th...

    Text Solution

    |

  18. If sumn = 55 then sumn^2 . = ...............

    Text Solution

    |

  19. sum(r=1)^n(2r+1)=...... .

    Text Solution

    |

  20. Sum of the series 1-(1)/(2)+1/(2^2)-1/(2^3)+............oo=.........

    Text Solution

    |