, , - , . ( ) . , 1 . . 22% . 1 . . (PV = 1 . .). / 22% 0,22. (rate of interest)[18] () ( , ). : 1. 0,22 = 220 . . : FV1 = PV+ = PV + PV i = PV (1 + i). FV1 = 1,22 . . . .1.
, 1 + i. , (PV) , .. FV1.
, . PV + PV x i + PV x i. FVn = PV(1 + i) n. (1 + i) n .
, , , . i FV1: FV2 = PV+ PV x i + FV1 x i = PV + PV x i + PV + PV x i = PV (1 + i)2. , (. .2):
FV3 = PV (1 + i)3. FVn = PV(1 + i) n.
:
1) (1 + i) n ;
2) FVIF i,n(. 4 2), 1 . . , i % . FVIF = (1 + i)n, , ,
3) , Excel (. 3)
N | I | PV | FV |
N, I ( i) PV, " FV ", . 3- 22%- PV= 1 . . / 1,816 . .
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(FV) (PV), /. , FV . , PV, " 72": FV = 2PV, = 72 / i %. , , 6% , 12 . 9% 8 .
, ( ,,,). , 20% , 10%. 5 . (1 + 0,2)(1 +0,1). i .
FV5 = 1 . 1,44 1,331 = 1,9166 . .