Sharp el-9950

239
Appendix
2. Error conditions during financial calculations
• r
≤
-
1
• N=0inPMTcalculations
• I%=0andPMT=0,orI%
≠
0andFV=(1/r)(1
+
r
×
s)
×
PMT,inNcalculations.
s=1(Pmt_Begin)
s=0(Pmt_End)
InI%calculations
IfPMT>0:
Pmt_Endmode: PV
≥
0andFV
+
PMT
≥
0
 PV<0andFV
+
PMT<0
Pmt_Beginmode: PV
+
PMT
≥
0andFV
≥
0
 PV
+
PMT<0andFV<0
IfPMT<0:
Pmt_Endmode: PV>0andFV
+
PMT>0
 PV
≤
0andFV
+
PMT
≤
0
Pmt_Beginmode: PV
+
PMT>0andFV>0
 PV
+
PMT
≤
0andFV
≤
0
IfPMT=0:PV
÷
FV
≥
0
• FV,N
×
PMT,PV
≥
0orFV,N
×
PMT,PV
≤
0
• Irrcalculation:allcashowshavethesamesign.
3. Distribution function
1
pdfnorm(
1
f (x) =exp (– )
(x – µ)
2
2σ
2
2πσ
2
pdfT(
f (x) =
πdf
df
2
x
2
df
df
+ 1
2
df + 1
2
-
Γ ( )
Γ ( ) (1
+ )
Calculationresult
→
Xreg
Calculationresult
→
Xreg
µ
: Mean
s
: Standard
deviation
However: Γ(s) = ∫
∞
0 x
s–1
e
-x
dx