. , :
2 + 2 + z 2 + Dxy + Exz + Fyz + Gx + Hy + Kz + L = 0.
, . , , , .
. , z :
(1)
(1) . a, b, c . .
(z = 0) , :
, z (x = 0) , :
z (y = 0) , :
, , , . (1).
. 1
(1) a ¹ b, b ¹ c, c ¹ a, , - , . , a = b, z.
(2)
a = b = c :
(3)
. , z :
(4)
(4) . a, b, c . (2).
2.
z (x = 0) ,
z (y = 0) ,
z = h, , , .
a = b (4), z,
(5)
. , Oxyz
(6)
|
|
(6) . a, b, c . 3
. 3.
z (y = 0) yOz (x = 0) ,
z = h, ½ h ½ > c, , .
(6) a = b, :
(7)
z.
. , Oxyz :
(8)
p > 0, q > 0 .
(8) . (4).
. 4.
xOz (y = 0) yOz (x = 0) , :
z = h (h > 0)
. (0;0;0) . = q (8) :
(9)
z.