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An equilateral triangle S A B is inscri...

An equilateral triangle `S A B` is inscribed in the parabola `y^2=4a x` having its focus at `Sdot` If chord `A B` lies towards the left of `S ,` then the side length of this triangle is `2a(2-sqrt(3))` (b) `4a(2-sqrt(3))` `a(2-sqrt(3))` (d) `8a(2-sqrt(3))`

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