In a hyperbola the distance between the foci is 2 and the distance between directrices is 1 Its eccentricity is
If the eccentricities of the hyperbolas x2a2−y2b2=1 and y2b2−x2a2=1 be e and e1, then 1e2+1e21=
If the eccentricity of a hyperbola is √2 and if the distance between the foci is 16, then its equation is