Parabola 1 Question 10
10. If the line is the directrix of the parabola , then one of the values of is
(a)
(b) 8
(c) 4
(d)
(2000, 2M)
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Answer:
Correct Answer: 10. (c)
Solution:
- Given,
Shifting the origin
Directrix of standard parabola is
Now,
On solving, we get