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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 |
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Answer» `(4)/(5)sqrt(39)` |
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