HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 228)

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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).

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