The equations of the directrices of the ellipse \[16{{x}^{2}}+25{{y}^{

1.	The equations of the directrices of the ellipse \[16{{x}^{2}}+25{{y}^{2}}=400\] are
A.	\[2x=\pm 25\]
B.	\[5x=\pm 9\]
C.	\[3x=\pm 10\]
D.	None of these
Answer» E.

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The equations of the directrices of the ellipse \[16{{x}^{2}}+25{{y}^{2}}=400\] are

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