Q.

L and L1  are the ends of the latusrectum  of the parabola x2 = 6y. The equation of OL and OL1 where O is the origin is 

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a

x2+2y2=0 

b

x2-4y2=0 

c

x2-2y2=0

d

x2+4y2=0 

answer is B.

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Detailed Solution

Given parabola x2=6y where 4a=6a=32 Now end points of latusrectum are L(2a, a)  and L1(-2a ,a) Equation  of OL y=12x                           x-2y=0, Equation of  OL1 is x+2y=0 combined equation is  x2-4y2=0Question Image

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L and L1  are the ends of the latusrectum  of the parabola x2 = 6y. The equation of OL and OL1 where O is the origin is