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Question

If (2,0) is vertex and yaxis is the directrix of a parabola. Then its focus will be

A
(0,0)
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B
(2,0)
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C
(4,0)
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D
(2,0)
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Solution

The correct option is C (4,0)
Since the directrix is x=0 and vertex is (2,0) focus will be on xaxis
Since the distance between directrix and vertex is 2.
distance between focus and vertex will be 2.
Coordinate of focus will be (4,0)

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