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The extremities of latus rectum of a par...

The extremities of latus rectum of a parabola are (1, 1) and `(1,-1)` . Then the equation of the parabola can be (a)`y^2=2x-1` (b) `y^2=1-2x` (c)`y^2=2x-3` (d) `y^2=2x-4`

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