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vishal singh Grade: 11
        

if focus is(1,2) and eq.of directrix is 3x-4y-15=0 .find equation of parabola.sir i attempted but my answer is coming wrong

6 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

eq of directrix : 3x-4y-15 = 0                    (given)


focus = (1,2)                                           (given)


perpendicular distance from directrix to any point on parabola is equals to distance bw any point on parabola to focus...


3x-4y-15/5 = {(x-1)2+(y-2)2}1/2


squaring both sides


(3x-4y-15)2 = 25{(x-1)2+(y-2)2}2


this is the required eq of parabola

6 years ago
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