2


10 . . 40 . ., 15 - 30 . . 2 . ., .

, . ?


:


: .

(10, 4) (15,2).

= {10-15; 4-2} = {-5 ; 2}

: 2 (P-10) +5 (Q 4) = 0.

2P + 5Q 40 = 0


2 . .

2*2 + 5 Q 40  = 0

Q = 36/5 = 7,2

  = 7,2 * 2 = 14,4 . .

Q = 5, = 7,5, () = 37,5

Q = 6, = 5, () = 30

Q = 7, = 2,5, () = 12,5

, 4 . 10 . .

= 10 . . .

4


: Q1 D = 160 - P1; Q2 D = 160 - P2 . :

= 5 + 5 Q + 0,25 Q2,

1) ?

2) , ?

3) .


:


,  1 = 160 Q1 D

.

, MR = MC

MR = R| = 160 2 Q

= | = 0,5 Q + 5.  , Q = 62 = 98.

= TR TC = 9862 62 * 62 5 5 * 62 0,25*622 = 956 . .

98 . .

2= (160 Q2 D) / 2

.

MR = R| = 80 Q

= | = 0,5 Q + 5.  , Q = 50 = 55.

= TR - TC = 8050 0,5*2500 5 - 5*50 0,25*502 = 1875 . .

55 . .

, Q* *. 0 Q* ( , ) .

=MR-MC

() B. .


MC, MR


        


     P*                                  

                          

                     

                                                D

                       Q*           MR              Q


, , , , , ..

MR (Q) = P (Q).

, , . , , , , .

, , Q** , ( ).


MC, MR