.
(.. ) L . . ƒ(x, y, z). L n = , 1, 2, , n = .
- -1. -1 ()
max ∆S→0
L xoy, ƒ(x, y)
.
1)
L
x = x(t)
y = y(t) α ≤ t ≤ β
.
L = (x), a ≤ x ≤ b,
1. ,
. (1; ) . (2; 2)
2:
2) L
α ≤ t ≤ β
3
L:
: |
. (.. ) L . . ƒ(x, y, z). L n = , 1, 2, , n = . - -1. -1 () max ∆S→0
L xoy, ƒ(x, y)
. 1)
L x = x(t) y = y(t) α ≤ t ≤ β
.
L = (x), a ≤ x ≤ b,
1. , . (1; ) . (2; 2)
2:
2) L α ≤ t ≤ β
3 L:
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