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Q.

The co-ordinates of a point on the parabola y2 = 8x whose focal distance is 4 is

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a

2, 4

b

4, 2

c

2, -4

d

4, -2

answer is A, C.

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Detailed Solution

a+x=4 or 2+x=4  x=2

Putting in y2=8x, we get  y=±4.

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