Texas Instruments TI-84 Plus Manual Book page 639

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