A) \[\left( 0,-\frac{5}{2} \right)\]
B) \[\left( 0,\frac{5}{2} \right)\]
C) \[\left( \frac{5}{2},0 \right)\]
D) \[\left( -\frac{5}{2},0 \right)\]
Correct Answer: A
Solution :
Equation of parabola is \[{{x}^{2}}=-10y\] On comparing with \[{{x}^{2}}=-4ay\] we get \[-4a=-10\] or \[a=\frac{10}{4}=\frac{5}{2}\] Hence, coordinates of focus \[=(0,-5/2)\]
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