. ,
F1: + = 1 (6) F2: + = 1. (7)
. z = h
+ = 1+ + = 1+ (*)
a ¢2 = a 2(1+) , b ¢2 = b 2(1+); a ¢2= a 2½ 1+ ½, b ¢2= b 2½ 1+ ½,
h ¹ c
h ½ h ½> c
+ = 1
a ¢ b ¢ - a ¢ b ¢ - -
½ h ½, ½ h ½; ½ h ½< c
a b h = 0.
+ = 1 (Æ), h = c
(*) + = 0,
C 1(0, 0, c) C 2(0, 0, c).
y = h
= 1 (**) = 1
a ¢2 = a 2½ 1 ½ , c ¢2 = c 2½ 1 ½ a ¢2 = a 2(1+) , c ¢2 = c 2(1+).
h ¹ b , h
+ = 1, + = 1.
h = b (**)
= 0,
.
, F2 y = h , F1 h = a.
.
1. (7) , ½ z ½³ c, .. z < c F2. Ox Oy F1 A 1(a, 0, 0), A 2( a, 0, 0), B 1(0, b, 0), B 2(0, b, 0), . Oz . Oz F2 C 1(0, 0, c), C 2(0, 0, c), . Ox Oy F2.
2. , , , , O .
3. a = b , a = c y = h . b = c x = h.
4. Fo ,
Fo: + = 0.
M o(x, y, z o)Î Fo, M 1(x, y, z 1)Î F1, M 2(x, y, z 2)Î F2 x y, .
z o2= c 2( + ), z 12= c 2( + 1), z 22= c 2( + +1) Þ
½ z 12½ <½ z o2½ <½ z 22½, , F1 Fo, F2 . , z o2 z 12= z 22 z o2 = c 2 Þ
M o M 1=½ z o z 1½ = 0 M 2 M o=½ z 2 z o½ = 0,
|
|
M o, M 1, M 2 ( , z o, z 1 z 2 x ¥ y ¥). , .
5. , F1 . , F1 , .