焦点 (x^2)/(36)-(y^2)/(13)=1

解答

焦点

\frac{x ^{2}}{36} - \frac{y ^{2}}{13} = 1

(7, 0), (- 7, 0)

求解步骤

(h + c, k), (h - c, k)

计算双曲线性质

\frac{x ^{2}}{36} - \frac{y ^{2}}{13} = 1 :

左右开口双曲线，

(h, k) = (0, 0), a = 6, b = 13

(0 + c, 0), (0 - c, 0)

计算

c :

c = 6^{2} + 13^{2} : 7

(0 + 7, 0), (0 - 7, 0)

整理后得

(7, 0), (- 7, 0)