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The tangent at any point P on the ellips...

The tangent at any point P on the ellipse meets the tangents at the vertices A & `A^1` of the ellipse `x^2/a^2 + y^2/b^2 = 1` at L and M respectively. Then `AL.A^1M`= (A) `a^2` (B) `b^2` (C) `a^2+b^2` (D) `ab`

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