焦距
focal distance The distance from the center of a hyperbola to one of its foci, denoted by $c$. It satisfies $c^2 = a^2 + b^2$.
CSCA 数学 考试术语
focal distance The distance from the center of a hyperbola to one of its foci, denoted by $c$. It satisfies $c^2 = a^2 + b^2$.
CSCA 数学 考试术语