Home
Class 10
MATHS
If p+q = sqrt(13) and p-q = sqrt(5), th...

If `p+q = sqrt(13)` and ` p-q = sqrt(5)`, then the value of 2pq is

A

2

B

4

C

9

D

18

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • RIGHT CIRCULAR CYLINDER

    CALCUTTA BOOK HOUSE|Exercise Exercise - 2 (Long-answer type questions)|11 Videos
  • SIMILARITY

    CALCUTTA BOOK HOUSE|Exercise Exercise 5.2|27 Videos

Similar Questions

Explore conceptually related problems

If p + q = sqrt13 and p -q = sqrt5 , then the value of pq is

If p + q = sqrt13 p - q = sqrt5 then the value of pq is ____

If p : q = 5 : 7 " and " p - q = - 4 , then find the value of (3p + 4q) .

If p:q = 5:7 and p-q = -4 , then find the value of 3p+4q.

If cos^(-1) sqrt(p)+cos^(-1)sqrt(1-p)+cos^(-1) sqrt(1-q)=(3pi)/(4) , then the value of q is -

If cos^(-1)sqrt(p)+cos^(-1)sqrt(1-p)+cos^(-1)sqrt(1-q)=(3pi)/4, then the value of q is 1 (b) 1/(sqrt(2)) (c) 1/3 (d) 1/3

Let p , q , r in R^(+) and 27pqr ge (p+q+r)^(3) and 3p+4q+5r=12 . Then the value of 8p+4q-7r=

If the sides of the triangle ABC are p,q and sqrt(p^(2)+ pq+q^(2)), then the greatest angle of the triangle is-

Let alpha,beta be the roots of the equation x^(2)-px+r=0 and alpha//2,2beta be the roots of the equation x^(2)-qx+r=0 , then the value of r is (1) (2)/(9)(p-q)(2q-p) (2) (2)/(9)(q-p)(2p-q) (3) (2)/(9)(q-2p)(2q-p) (4) (2)/(9)(2p-q)(2q-p)

CALCUTTA BOOK HOUSE-SAMPLE QUESTIONS PAPERS-QUESTION
  1. The present price of a machine is ₹ 2V. If the price of the machine de...

    Text Solution

    |

  2. Falgumni, Shreya and Smita started a partnership bussiness ₹ 6000. At ...

    Text Solution

    |

  3. If p+q = sqrt(13) and p-q = sqrt(5), then the value of 2pq is

    Text Solution

    |

  4. In the trapezium ABCD, AB"||"CD and two points P and Q are on the side...

    Text Solution

    |

  5. Which one of the followings is correct ?

    Text Solution

    |

  6. If 35 is Removed from the Data: 30, 34, 35, 36, 37, 38, 39, 40, Then t...

    Text Solution

    |

  7. A man who takes a loan is called………..

    Text Solution

    |

  8. If x prop y and x prop z, tehn ( y + z) prop………..

    Text Solution

    |

  9. All of the diameters of the circle passes through the…………

    Text Solution

    |

  10. The sexagesimal value of the supplementary angle of (3pi)/8 is ……………

    Text Solution

    |

  11. The volume of the gratest solid cone that can be cut of from a solid h...

    Text Solution

    |

  12. The three co-terminus edges of a rectangular solid are 36 cm, 75 cm an...

    Text Solution

    |

  13. In case of compound interest, interset is to be added to principal at ...

    Text Solution

    |

  14. In DeltaABC, the point at which the bisectors of the angles /ABC and /...

    Text Solution

    |

  15. If sin 3 theta = cos 6 theta, then tan (60^@ - 3 theta) = 2/sqrt3

    Text Solution

    |

  16. If the ratio of the curved surface areas of two hemispheres be 4 : 25,...

    Text Solution

    |

  17. The median of 3, 4, 18, 20, 5 is 5.

    Text Solution

    |

  18. The rate of simple interest reduces from 4% to 3""1/4% and for this, A...

    Text Solution

    |

  19. If the rate of increase in population of is r% per year, the populatio...

    Text Solution

    |

  20. Fomd the value of a when (-1) is a root of the equation x^2 + ax + 3=...

    Text Solution

    |