, . , . , , .
, n . , . . s(t) , t . I. .
1. i i,i= 1,2,..., .
2. i- (.. i - ) : i - .
3. i- t () i- o .
, i , i- t - .
.
4-3
4 (n =4), .. . . , 6 . 100000 .
() | ($) | ($) | s(t) ($) |
. 4 . . (3), () . , , 4 . , .
, . , 4- 6- , ; 4- () . , 1 4 . 1, 2 5 , 1,2,3 6 .
|
|
(.. ) , . 4. . ( .).
4. | ||||
t | C | |||
+ s(t+1)- | + s(t)+s(1)- - I | |||
19.0+60-0.6=78.4 | 20+80+80-0.2-100=79.8 | 79.8 | ||
18.5+50-1.2=67.3 | 20+60+80-0.2-100=59.8 | 67.3 | ||
17.2+30-1.5=45.7 | 20+50+80-0.2-100=49.8 | 49.8 | ||
20+5+80-0.2-100=4.8 | 4.8 | |||
3. | ||||
t | C | |||
- + | + s(t)- - I+ | |||
19.0-0.6+67.3=85.7 | 20+80-0.2-100+79.8=79.6 | 85.7 | ||
18.5-1.2+49.8=67.1 | 20+60-0.2-100+79.8=59.6 | 67.1 | ||
14.0+1.8-4.8=17.0 | 20+10-0.2-100+79.8=9.6 | 17.0 | ||
2. | ||||
t | C | |||
- + | + s(t)- - I+ | |||
19.0-0.6+67.1=85.5 | 20+80-0.2-100+85.7=85.5 | 85.5 | ||
19.0-0.6+67.3=85.7 | 20+80-0.2-100+79.8=79.6 | 85.7 | ||
2. | ||||
T | C | |||
- + | + s(t)- - I+ | |||
17.2-1.5+35.5=51.2 | 20+50-0.2-100+85.5=55.3 | 55.3 |
. 5 . t = 3 . , 1 . t = 1 , . , 1 , 2 . , .
, , (3, , , 3) (3, 3, , ). 55 300 .
4.4,
1. 4-3 .
a) , 2 .
b) , 1 .
c) .
2. . , 50 . 200 . 120 , 20%. 150 , 10%. , 16 , , . , 10%. ?
|
|
3. . . 40 000 , 10%. 1300 , , 10% .
a) .
b) .
c) .
4. . , t s(t)=2(n-t) >t . t r(t)=r 2- t2 >t .
a) .
b) =10 000 , , =5.
5. , , 1 = 4, = 6000 , r(t) = n/(n + 1).
, p1, p2,..., . : r1, r 2. . , i - qi1 qi2 . , , . , . . .
.
1. i i, i= 1,2,..., n.
2. i- ( i- ) , .
3. i i - i - , .
, . ,
, , - .
- n - , - . - - , ( - ) - . i = 1,2, .
- , sn qn1 qn2.
,
i+1 , afn+1(xn+l) 0.
4-4
, 4000 2000 3 , , . 8% 1.8%, 1.7%, 2.1% 2.5% . , , 0.2% , , 0.5% . .
|
|
, .
4.
I 4 0< I 4< x4 , , I 4=0 - I 4. , 4 .
I 4* | ||
1.108 4 |
3.
,
I 3* | ||
2216+1.1909 3 |
2.
,
I 2* | ||
4597.8+1.27996 2 | x2 |
1.
,
I 1* | ||
7157.7+1.3849 1 | $4000 |
.
, .
, | |
I 1*= | |
I 2*= | |
I 3*=0 | |
I 4*=0 |
4.4, d
1. 10.-4 , , .
2. 10000 , . , . .
3. k . , . i - pi. i- o (i +1)- . - .
a) .
c) : n =3 , k= 2, p1 =$100, 2 = $130, 3=$120.
d)