272
APPENDIX
4. Calculation Equation Error Conditions
Used by This Unit
(1) Financial
* Define constants “r” and “s” when using in the equation below.
r= ÷ C/Y + 1
– 1 ,
1. I% calculation
1
If PMT=0
r=
–1
2
If PMT
≠
0
f(r)=PV + (1 + r
×
s)
×
PMT
×
+ FV
×
(1 + r)
–n
: (r
≠
0)
f(r) = PV + PMT
×
n + FV: (r = 0)
Calculate the following for r solved in
1
and
2
I(%) = 100
×
C/Y
×
( (r + 1)
–1)
2. PV calculation
1
If r
≠
0, r > -1
PV = - (1 + r
×
s)
×
×
PMT –FV
×
( 1 + r)
-n
2
If r=0
PV= -n
×
PMT –FV
3
If r
≤
-1
Error
I (%)
100
C/Y
P/Y
S=1 (Pmt_Begin)
S=0 (Pmt_End)
(
)
PV
FV
–
(
)
1
n
–
1–(1+r)
–n
r
P/Y
C/Y
1–(1+r)
–n
r
EL-9650-Appendix (265-281)
8/3/00, 5:06 PM
272
Summary of Contents for EL-9650
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