HP 35s Scientific Calculator - Manual (Page 272)

17-2 Miscellaneous Programs and Equations
Equation Entry:
Key in this equation:

Remarks:
The TVM equation requires that I must be non–zero to avoid a    error.
If you're solving for I and aren't sure of its current value, press
I
before you begin the SOLVE calculation ( I ).
Keys:
(In RPN mode)
Display: Description:
   
or current equation
Selects Equation
mode.
P  _ Starts entering
equation.

4
 
4 
I

 
Õ


 NÕ

_
 I F


_
4
 I


 Õ

_
 N

_
 B

_
 
Terminates the
equation.
  (hold)

 Checksum and length.