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The equation of a parabola having focus (3, 0) and directrix x + 3 = 0, isA. `y^(2)=12x`B. `y^(2)=-12x`C. `x^(2)=12y`D. `x^(2)=-12y` |
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Answer» Correct Answer - A Let p (x, y) be any point on the parabola. Then, `sqrt((x-3)^(2)+(y+0)^(2))=|(x+3)/(sqrt(1+0))|" [Using SP= PM]"` `rArr" "(x-3)^(2)+y^(2)=(x+3)^(2)rArry^(2)=12x` |
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