Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
8 Cards in this Set
- Front
- Back
|
y^2=4ax
focus and directrix |
(a,0)
x = -a |
|
|
y^2=-4x
focus and directrix |
(-a,0)
x = a |
|
|
x^2=4x
focus and directrix |
(0,a)
y = -a |
|
|
x^2=-4x
focus and directrix |
(0,-a)
y = a |
|
|
(y - k)^2 = 4a(x - h)
|
y = k
opens right vertex (h,k) Focus (h + a, k) directrix x = h - a |
|
|
(y - k)^2 = -4a(x - h)
|
y = k
opens left vertex (h,k) Focus (h - a, k) directrix x = h + a |
|
|
(x - h)^2 = 4a(y - k)
|
x = h
opens up vertex (h,k) Focus (h, k + a) directrix x = k - a |
|
|
(x - h)^2 = -4a(y - k)
|
x = h
opens down vertex (h,k) Focus (h, k - a) directrix x = k + a |
