1.

The equation of the ellipse whose foci are \[(\pm 5,\ 0)\] and one of its directrix is \[5x=36\], is

A. \[\frac{{{x}^{2}}}{36}+\frac{{{y}^{2}}}{11}=1\]
B. \[\frac{{{x}^{2}}}{6}+\frac{{{y}^{2}}}{\sqrt{11}}=1\]
C. \[\frac{{{x}^{2}}}{6}+\frac{{{y}^{2}}}{11}=1\]
D. None of these
Answer» B. \[\frac{{{x}^{2}}}{6}+\frac{{{y}^{2}}}{\sqrt{11}}=1\]


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