The solve soft menu, The root sub-menu, Function root – HP 48gII User Manual
Page 228: Variable eq
Page 6-27
The SOLVE soft menu
The SOLVE soft menu allows access to some of the numerical solver functions
through the soft menu keys. To access this menu use in RPN mode: 74
MENU, or in ALG mode: MENU(74). Alternatively, you can use
‚(hold)
7 to activate the SOLVE soft menu. The sub-menus provided by the SOLVE
soft menu are the following:
The ROOT sub-menu
The ROOT sub-menu include the following functions and sub-menus:
Function ROOT
Function ROOT is used to solve an equation for a given variable with a
starting guess value. In RPN mode the equation will be in stack level 3, while
the variable name will be located in level 2, and the initial guess in level 1.
The following figure shows the RPN stack before and after activating function
@ROOT:
In ALG mode, you would use ROOT(‘TAN(
θ)=θ’,’θ’,5) to activate function
ROOT:
Variable EQ
The soft menu key
@@EQ@@ in this sub-menu is used as a reference to the variable
EQ. Pressing this soft menu key is equivalent to using function RCEQ (ReCall
EQ).