Texas Instruments BA II Plus, Руководство пользователя

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116 BA II PLUS™ Calculator
Formulas
Formulas used internally by your calculator are included here
for your information.
Time Value of Money
[ ]
i e
y x
= −
× +
( ( )) ln 1
1
where: PMT
ƒ
0
y = C/Y
P
P/Y
x = (.01
Q
I/Y)
P
C/Y
C/Y = compounding periods per year
P/Y
= payment periods per year
I/Y = interest rate per year
i FV PV
N
= ÷ −
− ÷
( )
( ) 1
1
where: PMT = 0
The iteration used to compute i :
0
1 1
1
= + ×
− + 
 

+ × +
−
−
PV PMT G
i
i
FV i
i
N
N
( )
( )
I/Y = 100
Q
C/Y
Q
[ ]
e
y x ( ( ))
× +
−
ln 1
1
where: x = i
y = P/Y
P
C/Y
G
i
= 1 + i
Q
k
where: k = 0 for end-of-period payments
k = 1 for beginning-of-period payments
N
PMT G FV i
PMT G PV i
i
i
i =
× − ×
× ×

 

+
+
ln
ln ( ) 1
where: i
ƒ
0
N =
L
( PV + FV )
P
PMT
where: i = 0