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Q.

The equation of the ellipse whose focus is (3,2), eccentricity 34 and directrix  2xy+3=0  is

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a

14x2+33xy+17y2225x+74y+159=0

b

44x236xy71y2588x374y+959=0

c

44x2+36xy+71y2588x+374y+959=0

d

4x2+56xy+271y2188x+274y+359=0

answer is B.

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Detailed Solution

Let P(x,y) be the locus of the point

Equation of conic SP2=e2PM2

(x3)2+(y+2)2=916|2xy+35|2 x2+y26x+4y+13=916(4x2+y2+94xy6y+12x5) 80x2+80y2480x+320y+1040=36x2+9y2+8136xy54y+108x 44x2+71y2+36xy588x+374y+959=0

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