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- :
|
- :
|
- : (MU > 0).
(indifference curve) - (X Y), / /.
(Marginal Rate of Substitution) X Y [ MRSXY ]: Y, X , .
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: MRSXY .
MRSXY X (tg a1 > tg a2 )
: :
MRSXY = MUX / MUY
 |
.
:
- ;
- ;
- ;
- .
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| U(X,Y)=A*XaYb, a,b > 0, A > 0 | U(X,Y)=AX+BY A,B > 0 | U(X,Y)=min{AX,BY} A,B > 0 |
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| U(X,Y)=Y =U(Y) (U X) | U(X,Y)=AX2+BY2 A,B > 0 | U(X,Y)=Y-AX2 A > 0 |
 |
(budget constraint): ( ), .
I = PX ×X + PY×Y [ Y = I/PY (PX/PY)×X ]
:
 |
()
:
U(X,Y), 
PX, PY X0,Y0, .
U(X,Y) max, = PX ×X + PY×Y
() E(X0,Y0) .
: X0 Y0 :
|
|
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/ /
/ /
U(X,Y) PX, PY X0,Y0, 
.
I(X,Y) min, U(X,Y) = const =
() E(X0,Y0) .
:
