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Find the equation of the parabola whose ...

Find the equation of the parabola whose focus is (3, 4) and whose directrix is 3x + 4y + 25 = 0 . Also find the length of latus rectum of he parabola .

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The correct Answer is:
`:.` the required length of the latus rectum `= 4a = 2 xx 2a = 2 xx ` perpendicular distance from the focus upon the directrix `2 2 xx 10 = 20 ` unit .
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