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The circle drawn with variable chord x+ay=5 (a being parameter) of the parabola y^2=20x as diameter will touch the line:A) x=-5B) y=-5C) x+y =-5D) x-y+5=0

The circle drawn with variable chord x+ay=5 (a being parameter) of the parabola y^2=20x as diameter will touch the line:A) x=-5B) y=-5C) x+y =-5D) x-y+5=0

Grade:11

1 Answers

Jasmine Bajaj
21 Points
4 years ago
The chord is the focal chord, because focus (0,5) is satisfied on it. So it always passes through the directrix. Hence x=-5 is the right answer

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