1.

The locus of the point the chord of contact of tangents from which to the ellipse (x^2)/(a^2)+(y^2)/(b^2)=1. If (1"/"2,2"/"5) be the middle-point of the chord of the ellipse (x^2)/(25)+(y^2)/(16)=1, then that its length is

Answer»

`(4)/(5)sqrt(39)`
`(7)/(5)sqrt(37)`
`(7)/(5)sqrt(41)`
`(4)/(5)sqrt(51)`

ANSWER :C


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