(utlty of good) . . : , , . (law of diminishing marginal utility), (Gossen's First Law).
, . , . , .
MU (margnal utlty), , TU (total utlty), . , . ( ), (. 1). , .
) )
. 1. () ()
, , XV . , : , , , , , . . , . , . ֳ , .
, , ( ).
(utility function) , : TU = f (Q). : MU = d (TU) /d (Q).
(optimal consumption bundle), , (), , , .
(2- ) (law of equi-marginal utility, Gossen's Second Law ) , , , - , .
, , , , MU 1, MU 2, , MU ; 1, 2, ..., .