, , , , .. .
. . Sn n P , i . (iP) / 100. :
S 0 = P, S 1 = P + (iP) / 100 = P (1 +i/ 100),
Sn = Sn- 1+(iP) / 100 = P (1+((n- 1) i) / 100)+(iP) / 100 = P (1+(ni) / 100).
Sn = P (1+(ni) / 100), n = 0, 1,...,
, (1+(ni)/100) .
. .
P i% :
S 0 = P, S 1 = P+ (iP) / 100 = P (1 +i/ 100),
S 2 = S 1+(iS 1) / 100 = S 1(1 +i/ 100) = P (1 +i/ 100)2,
Sn = Sn- 1 +Sn- 1(1+(i) / 100) = P (1 +i/ 100) n.
Sn = P (1 +i/ 100) n, n = 0, 1, 2,..., | (1) |
.
30. 2000 3% .
S 5 = 2000(1+5 × 0,03) = 2300.
S 5 = 2000(1+0,03)5 = 2319.
, , .
, (1) ( ) ( ).
, , (1) .
S 1 + S 2 ++Sn = P (1 +i/ 100) ++P (1 +i/ 100) n =
=P (1 +i/ 100)(1+ (1 +i/ 100) ++ (1 +i/ 100) n- 1).
,
G=P (1 +i/ 100)((1 +i/ 100) n- 1) / (i/ 100). | (2) |
31. . 30000 , 8 % . ?
. (2)
G = 30000×1,08(1,0831) / 0,08=105183,36.
1. 8 . . 100000 4% , ?
|
|
Q0 i=100% , . , Q1 = Q0(1+1/2) = 3/2 Q0 . Q2 = Q0(1+1/2)2 = 2,25 Q0. , Q3 = Q0(1+1/3)3 = 2,37Q0. , Q12 = Q0(1+1/12)12 = 2,61 Q0, Q8720 = Q0(1+1/8720)8720 = 2,718 Q0. , Qn/Q0 xn = (1+1/n)n, e.
, i n , t
Qn = Q 0(1 +i/ (100 n)) nt
Qn = Q 0((1 +i/ (100 n))100 n/i )(it) / 100.
m=100n/i, n¥, m ¥.
lim n ¥ Qn = lim m ¥ ((1+1 /m) m)(it) / 100 = Q 0 e (it) / 100.
.
32. 1% . ? (1)
Q=Q 0(1-1 / 100)182,
Q=Q 0((1-1 / 100)-100)-182 / 100 = Q 0 e- 1,82,
6 .
, , . . . , . S, i%, (1+i/100) = q , n . (1) , n
Pn = S/qn.
V :
V = S (1 /q+ 1 /q 2 + + 1 /qn).
,
V = S (1 /qn)((qn 1) / (q 1)). | (3) |
33. 15000 5 4% .
(3),
V = 15000((1,04)51) / (0,04 (1,04)5) = 66777.
, , . 66777 . 60000 , , . , 15000 73000 , .
34. 73000 , 15000 , 4% . , ?
(3),
73000=15000(1 / 1,04 n)((1,04 n 1) / 0,04)
|
|
1,04 n = 1,2417219.
n = 6
, 6 , .
. , , , . V n i% q=(1+i/100), 3:
S=Vqn (q 1) / (qn 1).
2. 200000 10 11% .