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Q.

The curve that passes through the point (2, 3) and that the property that the segment of any tangent to it lying between the coordinate axes is bisected by the point of contact, is given by:

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a

y=6x

b

x2+y2=13

c

x22+y32=2

d

2y3x=0

answer is A.

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Detailed Solution

Let P(x,y) be any point on the curve. The equation of tangent at P is given by

Yy=dydx(Xx)

This cuts coordinate axes at Axydxdy,0 

and B0,yxdydx

 It is given that P(x,y) is the mid-point of AB.

 2x=xydxdy and 2y=yxdydx

 dydx=yx xdy+ydx=0d(xy)=0xy=c

The curve passes through (2, 3).

 2×3=CC=6.

The equation or the curve is xy = 6 or, y=6x.

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