Texas Instruments TI-84 - Manual (Page 639)

Appendix B: Reference Information 636
The iteration used to compute i :
where: i
ƒ 0
where: x = i
y = P/Y
÷
C/Y
where: k = 0 for end-of-period payments
k = 1 for beginning-of-period payments
0 PV PMT G
i
1 1 i +
( ) N –
–
i
------------------------------ FV 1 i +
( ) N – Ч
+
Ч
+ =
I% 100 C Y e
y x 1 +
( )
ln
Ч ( )
1 –
[ ] Ч ⁄ Ч
=
G
i
1 i k
×
+ =
N
PMT G
i
FV i
Ч
–
Ч
PMT G
i
PV i
Ч
+
Ч
----------------------------------------------
⎝ ⎠
⎛ ⎞
ln
1 i +
( )
ln
---------------------------------------------------------- =
N
– PV FV
+
( ) PMT ч
=