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Q.

The directrix of the parabola y2+4x+3=0 is

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a

x−3/4=0

b

x+1/4=0

c

x−1/4=0

d

x−4/3=0

answer is C.

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Detailed Solution

y2=−4(x+3/4), the directrix is ∣x+3/4−1=0.
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The directrix of the parabola y2+4x+3=0 is