Casio FX-CG10 User Manual
Page 269
7-5
u I %
i
(effective interest rate)
i
(effective interest rate) is calculated using Newton’s Method.
PV
+
α ×
PMT
+
β ×
FV
= 0
To
I
% from
i
(effective interest rate)
n
............ number of compound periods
FV
......... future value
I
% ......... annual interest rate
P/Y
........ installment periods per year
PV
......... present value
C/Y
........ compounding periods per year
PMT
...... payment
• A deposit is indicated by a plus sign (+), while a withdrawal is indicated by a minus sign (–).
Press
2(COMPND) from the Financial 1 screen to display the following input screen for
compound interest.
2(COMPND)
n
........... number of compound periods
I
% ........ annual interest rate
PV
........ present value (loan amount in case of loan; principal in case of savings)
PMT
..... payment for each installment (payment in case of loan; deposit in case of savings)
FV
........ future value (unpaid balance in case of loan; principal plus interest in case of
savings)
P
/
Y
....... installment periods per year
C
/
Y
....... compounding periods per year
{ }
×
C
/Y
×
100...
I
% =
(1+ i )
–1
P
/Y
C
/Y
(Other than those above)
i
× 100 ................................. (P/Y = C/Y = 1)
{
{ }
×
C
/Y
×
100...
I
% =
(1+ i )
–1
P
/Y
C
/Y
(Other than those above)
i
× 100 ................................. (P/Y = C/Y = 1)
{