(D demand) (S-supply). . , , , , . : , , ( ) , , , . , ( ) ( ).
. , , , , , . ( ) ( ).
, . , . .
, , . , . . . . . .
1.
:
Q d = 2400 - 10p,
Qs = 1000 + 25p,
P- ( ),
Q .
- .
- 30. , ?
:
, . .
Q d = Qs
2400 - 10p= 1000 + 25p
|
|
2400-1000=25+10
1400=35
= 40 .
- , , .
Q d = 2400 - 10p = 2400-10 40= 2000
30 ., : 1000+25 30=1750 ,
Q d= 2400 - 10 30=2100 , .. 2100-1750=350 , .
2.
:
Q d = 620 - 25p,
Qs = 100 + 105p
) .
) 2,5 . , , .
:
) - . , , - .
:
Q d= Q s
620 - 25p = 100 + 105p
620 100 = 105 +25
520 = 130
= 4 ..
, , 4 .. .
Q d = 620 - 25p,
Q d=620 -25 4=620-100=520 .
Q s = 100 + 105p=100+105 4=100+420=520.
) 2,5 . .: - , -( ), .. (-2,5 ..).
.
Q d = 620 - 25p .
Qs = 100 + 105(p . 2,5)
Q d = Q s:
620 - 25p =100 + 105(p 2,5),
620 25-100-105+262,5 = 0
, .
782,5 = 130 = 6,02 . .
= 6 : Q d = 620 - 25p,
Q d = 620 - 25 6 = 470
2 . ., 470 2 470 = 940 ..
6-2,5 = 3,5 .. 4-3,5 = 0,5 ..,
470 0,5 = 235 ..
3.
, .
( .) | ||||
Q() |
(TR) : TR= P Q,
P ,
Q- .
:
1) TR= P Q= 180 200 = 36000 .
2) TR= P Q= 150 300 = 45000 .
3) TR= P Q= 120 400 = 48000 .
4) TR= P Q= 90 500 = 45000 .
:
. = , ( ).
.= =
=
.= =
=
.= =
=
, . (2,2),(1,28), 1, (1), (0,78), .. 1. .
|
|
( 2,2) (45000-36000) 9000 .
( 1,28) (48000-45000) 3000 .
(0,78) (45000-48000) 3000 .
4.
2, 30 20 ?
:
,
- ;
- .
.
= =2 %
5.
2850 400 . -0,3. , 7 %?
:
,
- ;
(%) .
= (%) = - 0,3 7 = - 2,1%
2,1% 400 8,4 . (400-8,4) 391,6 . .
6.
Q = 0,4 . 5000 . 10000 . .
:
= ,
- .
Q = 0.4 =0.4 5000=2000
Q = 0.4 =0.4 10000=4000
= =
, 1.