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Mathematics - Ellipse Question with Solution | TestHub

MathematicsEllipseChord of ContactMedium2 minPYQ_2016
MathematicsMediumsingle choice

Paragraph: Let and , for and , be the foci of the ellipse Suppose a parabola having vertex at the origin and focus at intersects the ellipse at point in the first quadrant and at point in the fourth quadrant.
Question: If the tangents to the ellipse at and meet at and the normal to the parabola at meets the -axis at , then the ratio of area of the triangle to area of the quadrilateral is

Question diagram: Paragraph: Let F 1 ​ ( x 1 ​ , 0 ) and F 2 ​ ( x 2 ​ , 0 ) ,

Options:

Answer:
C
Solution:


Equation of chord of contact MN is x= 3 2
Let R(h,k)
Equation of chord of contact
xh 9 + yk 8 =1
Comparing we get R(6,0)
Normal to parabola atM :y- 6= -62·1 x-32
Solving it withy=0,we getQ 72, 0
Area of triangle MQR=12. 6-72. 6=564
Area of quadrilateralMF1NF2=2·121--16=26
Required ratio= 5 : 8

Stream:JEE_ADVSubject:MathematicsTopic:EllipseSubtopic:Chord of Contact
2mℹ️ Source: PYQ_2016

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