The sum of the reciprocals of focal dist...

The sum of the reciprocals of focal distances of a focal chord PQ of `y^(2)`=4ax is

A

`(1)/(a)`

B

a

C

2a

D

`(1)/(2a)`

Verified by Experts

The correct Answer is:

A

PARABOLA
MODERN PUBLICATION|Exercise LATEST QUESTION FROM AIEEE/JEE EXAMINATIONS|5 Videos
MOCK TEST PAPER -IV
MODERN PUBLICATION|Exercise SELECT THE CORRECT ANSWER|60 Videos
PERMUTATIONS AND COMBINATIONS
MODERN PUBLICATION|Exercise Recent Competitive Questions|6 Videos

Similar Questions

Explore conceptually related problems

The product of the abscissae of the extremities of a focal chord of a parabola y^(2)=16 x is

A variable plane moves, so that the sum of the reciprocals of its intercepts on the coordinate axes is 1/2. Then the plane passes through

If t is a parameter of one end of a focal chord of the parabola y^(2) =4ax then its length is

The sum of the focal distances of any point on the conic (x^(2))/(25)+(y^(2))/(16)=1 is...

Find the sum of the focal distance of any point on the ellipse 4x^2+9y^2=36 .

Locus of the point of intersection of the tangent at the ends of focal chord of an ellipse (x^(2))/(a^(2))+(y^(2))/(b^(2))=1 , (b lt a) is

Find dy/dx if y^2=4ax

If b and c are the length of the segments of any focal chord of a parabola y^(2)=4ax then the length of the semi latus rectum is

The tangents drawn at the extremities of a focal chord of the parabola y^(2)=16x