(C>R), . (C<R), , =R Q* , 3. MC=MR - (P*,Q*) . - , (price- searcher).
.3. -
4. - , . (TR) (TC) (P) (ATC), (*>ATC).(.4). , (, ) () () : =TR-TC =(*- )Q*. ( .4 ).
. 4. - .
(D), - (*<*) (.6).
.6. - .
, - , , .. P*<AVC*. - , .
6. MR=P(1+1/Ed)
d - , (Ed<0 ).
(MR) (P) (Ed) : - , (..7).
, .. 0<Ed<1, MR<0 . , .. >0, , , (=R) .
.7. -.
:
- , IdI>1;
- (Q*), , MR=0;