Home
Class 11
MATHS
If P=(x , y),F1=(3,0),F2=(-3,0), and 16 ...

If `P=(x , y),F_1=(3,0),F_2=(-3,0),` and `16 x^2+25 y^2=400` , then `P F_1+P F_2` equal 8 (b) 6 (c) 10 (d) 12

A

8

B

6

C

10

D

12

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • CIRCLE AND CONICS

    TARGET PUBLICATION|Exercise EVALUATION TEST|28 Videos

  • CIRCLE AND CONICS

    TARGET PUBLICATION|Exercise CRITICAL THINKING|75 Videos

  • FACTORIZATION FORMULAE

    TARGET PUBLICATION|Exercise EVALUATION TEST|8 Videos

Similar Questions

Explore conceptually related problems

If P=(x,y),F_(1)=(3,0),F_(2)=(-3,0) and 16x^(2)+25y^(2)=400, then PF_(1)+PF_(2) equal 8 (b) 6 (c) 10(d)12

If f(x),g(x) be twice differentiable function on [0,2] satisfying f''(x)=g''(x) , f'(1)=4 and g'(1)=6,f(2)=3,g(2)=9,then f(x)-g(x) at x=4 equals to:- (a) -16 (b) -10 (c) -8

If P={:[(-1,0),(2,-1)]:}andf(x)=x^(2)-2x+2 , then find f(P).

if f(x)=3|x|+|x-2| then f'(1) is equal to a)2 b)1 c)3 d)0

If f(x),g(x) be twice differentiable functions on [0,2] satisfying f''(x)=g''(x)f'(1)=2g'(1)=4 and f(2)=3g(2)=9 then f(x)-g(x) at x=4 equals (A) 0 (B) 10 (C) 8 (D) 2

P(x,y) is any point on ellipse 16x^(2)+25y^(2) =400 . If F_(1)-=(3,0) and F_(2) -=(-3,0) , then prove that PF_(1)+PF_(2) is constant and find its value .

If |f(x)-f(y)|<=2|x-y|^((3)/(2))AA x,y in R and f(0)=1 then value of int_(0)^(1)f^(2)(x)dx is equal to (a) 1 (b) 2 (c) sqrt(2)(d)4

If 8f(x)+6f((1)/(x))=x+5 and y=x^(2)(f(x), then (dy)/(dx) at x=-1 is equal to 0( b) (1)/(14)(c)-(1)/(4)(d) None of these

If f(x) = | x | + [ x ] , then f( -3/2 ) + f( 3/2 ) is equal to : ( a ) 1 ( b ) -1/2 ( c ) 2 ( d ) 1/2

TARGET PUBLICATION-CIRCLE AND CONICS -COMPETITIVE THINKING
  1. If the equation of ellipse is (x ^(2))/(a ^(2)) + (y ^(2))/(b ^(2))=1 ...

    Text Solution

    |

  2. Find the differential equation of an ellipse with major and minor axes...

    Text Solution

    |

  3. If P=(x , y),F1=(3,0),F2=(-3,0), and 16 x^2+25 y^2=400 , then P F1+P F...

    Text Solution

    |

  4. The foci of 16x ^(2) + 25 y^(2) =400 are

    Text Solution

    |

  5. If the angle betweent he lines joining the end points of minor axis of...

    Text Solution

    |

  6. B is extermity of the minor axis of an elipse whose foci are S and S'....

    Text Solution

    |

  7. Let S and s' be the foci of an ellipse and B be one end of its minor a...

    Text Solution

    |

  8. The distanve between the foci of an ellipse is 16 and eccentricity is ...

    Text Solution

    |

  9. If the eccentricities of the two ellipse (x^(2))/(169)+(y^(2))/(25)=...

    Text Solution

    |

  10. The length of the latus rectum of the ellipse 5x ^(2) + 9y^(2) =45 is

    Text Solution

    |

  11. The length of the latus rectum of the ellipse 9x ^(2) + 4y ^(2) =1, is

    Text Solution

    |

  12. The length of the latus rectum of an ellipse is 1/3 of the major axis....

    Text Solution

    |

  13. If the latusrectum of an ellipse is equal to one half of its m...

    Text Solution

    |

  14. The distance between the focii of the ellipse x =3 cos theta , y =4 si...

    Text Solution

    |

  15. The equation of an ellipse whose focus is (-1,1), directrix is x -y + ...

    Text Solution

    |

  16. The centre of the ellipse ((x+y-3)^(2))/(9) + ((x -y +1)^(2))/(16) =...

    Text Solution

    |

  17. Thet eccentricity of the ellipse ((x-1)^(2))/(9)+ ((y+1)^(2))/(25) =...

    Text Solution

    |

  18. The ecfentricity of the ellipse ((x-1)^(2))/(2) + (y + (3)/(4)) ^(2)...

    Text Solution

    |

  19. The centre of ellipse 4x ^(2) + y^(2) -8x + 4y-8=0 is

    Text Solution

    |

  20. For the ellipse 25 x ^(2) + 9y ^(2) -150x-90y + 225 =0, the eccentrici...

    Text Solution

    |