Semi transverse axis of hyperbola is 5. Tangent at point P and normal at P meet conjugate axis at A and B respectively. The circle on AB as diameter passes through two fixed points, the distance between which is 20 . The eccentricity of hyperbola is ________.
2
8
9
7
Consider hyperbola
Tangent to it any point is
It meets y-axis at
Normal at point P is
It meets y-axis at
Now, circle with diameter as AB is
This circle passes through fixed points distance between which is 2ae.
(given)
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