NDA2021MathematicsHyperbolaActual
If any point on a hyperbola is (3 , 2 ) , then what is the eccentricity of the hyperbola?
Options
- A3 2
- B5 2
- C11 2
- D13 2
Correct answer
D. 13 2
Step-by-step solution
Let equation of hyperbola is x^2 a^2 - y^2 b^2 =1 then eccentricity e= 1+ a^2 b^2 Now, as point (3 , 2 ) lies on hyperbola then, 3^2 ^2 a^2 - 2^2 ^2 b^2 =1 9 ^2 a^2 - 4 ^2 b^2 =1 This is true for a^2=9 and b^2=4 eccentricity (e)= 1+ 9 4 = 13 2