Find the Directrices of the Ellipse $64 x ^ { 2 } + 49 y ^ { 2 } = 3136$

question 111

Multiple Choice

Find the directrices of the ellipse.
- $64 x ^ { 2 } + 49 y ^ { 2 } = 3136$

• A) \(y = \pm \frac { 64 } { \sqrt { 15 } }\)
• B) \(x = \pm \frac { 64 } { \sqrt { 15 } }\)
• C) \(x = \pm \frac { 64 } { \sqrt { 113 } }\)
• D) \(y = \pm \frac { 49 } { \sqrt { 15 } }\)

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