() , ..
, , .
, .
:
U = f(X, Y..Z).
U ; X, Y, Z .
, , . , , , () . , , .
(MU(X)) ∆U(X), (∆), : MU(X) = ∆U/∆X = Uיִ(X).
, . | , TU, | , MU, |
TU c . MU , .
: , .
.
TU,
0 Q, .
MU,
0 Q, .
. , . , . () , , . .
|
|
: , , , .
MU 1 MU2 MUn
--------- = ---------- = ---------- = λ
1 2 Pn
P1: 2: n = MU1: MU2: MUn.
. (MU1/P1 = MU2/P2).