If the slope of an asymptote of the hyperbola whose center is at the origin and focus is on the coordinate axis is 2 / 7, the eccentricity of the hypohyperbola can be calculated
The slope of asymptote is 2 / 7, that is, B / a = 2 / 7
b^2/a^2=4/49
(a^2+b^2)/a^2=(4+49)/49
c^2/a^2=53/49
e^2=c^2/a^2=53/49
E = root 53 / 7