Find the Directrices of the Hyperbola $$81 y ^ { 2 } - 16 x ^ { 2 } = 1296$$

question 161

Multiple Choice

Find the directrices of the hyperbola.
- $$81 y ^ { 2 } - 16 x ^ { 2 } = 1296$$

• A) \(x = \pm \frac { 16 } { \sqrt { 97 } }\)
• B) \(y = \pm \frac { 16 } { \sqrt { 97 } }\)
• C) \(\mathrm { y } = \pm \frac { 81 } { \sqrt { 97 } }\)
• D) \(y = \pm \frac { 16 } { \sqrt { 65 } }\)

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