- . . (x, y, z) . , , , . (x, y, z).
F(x, y, z) = 0.
, , , .
. 1 (a, b, c) R.
M(x,y, z) .
1 = R, ,
(x a)2 + (y b)2 + (z c)2 = R2 .
- .
(1) (2).
F1(x, y, z) = 0, (1)
F2(x, y, z) = 0. (2)
(L), (1) (2). (1) (2).
3. . 0(x0, y0, z0) n = {A, B, C}. . (x, y, z,) .
0= {x x0, y y0, z z0}.
- (1)
, . + By + Cz + D = 0 (2)
.. x, y z. , . (x0, y0, z0) (2).
Ax0 + By0 +Cz0 + D = 0 (3)
(2) (3).
A(x x0) + B(y y0 ) + C(z z0) = 0 .
, (2) . , , .
(1) A1x + B1y + C1z + D1 = 0, n 1 = {A1, B1, C1}
(2) A2x + B2 y + C2z + D2 = 0. n2 = {A2, B2, C2}
a) n1 ║ n2 - .
n 1 b) -
n2
n1
n 2
) , M1(x1, y1, z1), M2(x2, y2, z2), M3(x3, y3, z3).
(x, y, z). 1, 12, 13 .
1 - .
2
3 .
. , (2, 0, 3) 3x + 4y - 2z + 5 = 0.
3(x 2) + 4(y 0) 2(z 3) = 0.
- . .
A1x + B1y + C1z + D1 = 0, .
A2x + B2 y + C2z + D2 = 0.
0(x0, y0, z0) s = {m, n, p} , . M(x, y, z) , .
M0M ║ s, M0M = {x x0, y y0, z z0 }
- .
|
|
, s1 ={m1, n1, p1}
s2 = {m2, n2 , p2}, - ,
m1m2 + n1n2 + p1p2 = 0 .
- . Ax + By + Cz + D = 0, n ={A, B, C},
s ={m, n, p} Am + Bn + Cp = 0
n = {A, B, C}
n = { A, B, C}
s = {m, n, p} .
.
- , (2, 1, 3),
- , 0(0, 1, -2) 2 x y + 3z + 1 = 0,
x + y + 2z + 3 = 0.
. A( x x0) + B(y y0) + C(z z0) = 0. n = {A, B, C,} = {-5, -1, 3}.
-5(x 0) -1(y 1) + 3(z + 2) = 0. 5x + y 3z - 7 = 0 .
3. ABCD: (3, 1, 4), (-1, 6, 1), C(-1, 1, 6),
D(0, 4, -1).
;
AD;
;
;
;
;
, D .
D AB ={-4, 5, -3},
AD = {-3, 3, -5}
AC = {-4, 0, 2}
n
A B
O1
C
.
3.1.
3.2. 3.3. n =
3.4.
3.5
3.6. n = {10, 20, 20}, 10(x - 3) + 20(y 1) + 20(z 4) = 0, x + 2y + 2z - 13 = 0.
3.7. s = n = {10, 20, 20},
.
z
M (x,y,z)
(A)
y
M1(x, y) (L)
x
(A) (L), . , , .
F(x, y) = 0. (1)
(x, y) (L). (1) 1(, y), (x, y, z) , z.
F(x, y) = 0 , z.
, F(x, z) = 0 , y. F(y, z) = 0 , x.
, y2 = 2x , , z.
z
y
x