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A vertical line passing through the poin...

A vertical line passing through the point `(h, 0)` intersects the ellipse `x^2/4+y^2/3=1` at the points `P` and `Q`.Let the tangents to the ellipse at P and Q meet at `R`. If `delta (h)` Area of triangle `deltaPQR`, and `delta_1 max_(1/2<=h<=1)delta(h)` A further `delta_2 min_(1/2<=h<=1) delta (h)` Then `8/sqrt5 delta_1-8delta_2`

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