Page 28 - DECO403_MATHEMATICS_FOR_ECONOMISTS_ENGLISH

D-9<81 >-C - ?71@/4 2;> /A>B1 K ";@1

';8A@5;: C@@CK=B; =G H<9 ;=J9B 7IFJ9 / Z 0 CF / Z 0 K<=7< =G 5 <MD9F6C@5 C:

/ Z 0
2
* )

1 ( 1

+ ,

2

CAD5F=B; H<9A

5B8

5B8

B8
'CK CB / 5L=G 4 5B8
CB 0 5L=G 4
-5?=B; 8=GH5B79G =BHC 7CBG=89F5H=CB 5B GEI5F9 =G 8F5KB

)?1 ;2 5:1-> A:/@5;:? 5: /;:;95/?

-<9F9 5F9 A5BM IG9G C: @=B95F :IB7H=CBG 5B8 G=AD@9 @=B9G =B 97CBCA=7G -<9 DF=79 C: 7CAAC8=HM =B
H<9 A5F?9H =G 89H9FA=B98 6M 89A5B8 5B8 GIDD@M ": 89A5B8 5B8 GIDD@M :IB7H=CB =G ;=J9B H<9B 5H
H<9 9EI=@=6F=IA @9J9@ K9 75B 89H9FA=B9 GI7< 5 @9J9@ C: DF=79 5B8 EI5BH=HM K<9F9 6CH< H<9 G9@@9F 5B8
7IGHCA9F KCI@8 69 G5H=G:=98
GGIA9 H<5H 89A5B8 :IB7H=CB =G ( Z ' ^ =
B8 GIDD@M :IB7H=CB =G ( Z ' ==
0<9F9 ( G<CKG H<9 EI5BH=HM C: 7CAAC8=HM 5B8 ' =G A95BH :CF DF=79
'CK K9 K=@@ HFM HC 89F=J9 GI7< 5 J5@I9 C: ( 5B8 ' K<=7< KCI@8 G5H=G:M 6CH< H<9 9EI5H=CBG = 5B8 ==
CF H<=G 6CH< H<9 9EI5H=CBG B998 HC 69 GC@J98 "B H<9 GH5H9 C: 9EI=@=6F=IA 89A5B8 5B8 GIDD@M
Z ' Z '
(F '

(F '

)IHH=B; J5@I9 C: ' =B 9EI5H=CB ( Z Y Z
-<=G K5M 9EI=@=6F=IA DF=79 5B8 EI5BH=HM C: 89A5B8 5B8 GIDD@M KCI@8 69

#* , $&# '' #" )" * &' (,