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At any point on the curve 2x^2y^2-x^4=c ...

At any point on the curve `2x^2y^2-x^4=c ,` the mean proportional between the abscissa and the difference between the abscissa and the sub-normal drawn to the curve at the same point is equal to (a)Ordinate (b) radius vector (c)x-intercept of tangent (d) sub-tangent

A

ordinate

B

radius vector

C

x-intercect of tangent

D

sub-tangent

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