zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的 Geometry >

焦点 ((y+3)^2)/9-((x-2)^2)/(16)=1

解答

焦点

\frac{( y + 3 ) ^{2}}{9} - \frac{( x - 2 ) ^{2}}{16} = 1

解答

(2, 2), (2, - 8)

求解步骤

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

计算双曲线性质

\frac{( y + 3 ) ^{2}}{9} - \frac{( x - 2 ) ^{2}}{16} = 1 :

上下开口双曲线，

(h, k) = (2, - 3), a = 3, b = 4

(2, - 3 + c), (2, - 3 - c)

计算

c :

c = 3^{2} + 4^{2} : 5

(2, - 3 + 5), (2, - 3 - 5)

整理后得

(2, 2), (2, - 8)

作图

流行的例子

4y^2+48x-20y=71

4 y^{2} + 48 x - 20 y = 71

y^{2} + 4 x = 0

f oc i y^{2} = - 9 x

半径 x^2+y^2=36

r a d i u s x^{2} + y^{2} = 36

f oc i y = x^{2}