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  • The point is one extremity of focal chord of parabola <img alt="\math

The point \left ( 1,2 \right ) is one extremity of focal chord of parabola \mathrm{y^{2}=4 x}. The length of this focal chord is

Option: 1

2


Option: 2

4


Option: 3

6


Option: 4

none of these


Answers (1)

best_answer

The parabola \mathrm{y^{2}=4 x}. Here \mathrm{a=1} and focus is (1,0).

he focal chord is ASB. This is clearly latus rectum of parabola, its value = 4.


Hence (B) is the correct answer.

 

Posted by

Pankaj Sanodiya

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