A) \[x=1\]
B) \[y=0\]
C) \[x=-1\]
D) \[y=-1\]
Correct Answer: D
Solution :
Equation of parabola is \[{{x}^{2}}-4x-8y+12=0\] Þ\[{{x}^{2}}-4x+4=8y-8\] Þ \[{{(x-2)}^{2}}=8(y-1)\]Þ\[{{X}^{2}}=8Y\] Comparing with \[{{X}^{2}}=4aY\], we get \[a=2\] \ Directrix is \[Y=-a\] Þ \[y-1=-2\]Þ \[y=-1\].You need to login to perform this action.
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