HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 202)

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Page 6-1

Chapter 6

Solution to single equations

In this chapter we feature those functions that the calculator provides for

solving single equations of the form f(X) = 0. Associated with the 7 key

there are two menus of equation-solving functions, the Symbolic SOLVer

(„Î), and the NUMerical SoLVer (‚Ï). Following, we present

some of the functions contained in these menus. Change CAS mode to

Complex for these exercises (see Chapter 2).

Symbolic solution of algebraic equations

Here we describe some of the functions from the Symbolic Solver menu.

Activate the menu by using the keystroke combination . With system flag 117

set to CHOOSE boxes, the following menu lists will be available:

Functions DESOLVE and LDEC are used for the solution of differential

equations, the subject of a different chapter, and therefore will not be

presented here. Similarly, function LINSOLVE relates to the solution of multiple

linear equations, and it will be presented in a different chapter. Functions

ISOL and SOLVE can be used to solve for any unknown in a polynomial

equation. Function SOLVEVX solves a polynomial equation where the

unknown is the default CAS variable VX (typically set to ‘X’). Finally, function

ZEROS provides the zeros, or roots, of a polynomial. Entries for all the

functions in the S.SLV menu, except ISOL, are available through the CAS help

facility (IL@HELP ).

Function ISOL

Function ISOL(Equation, variable) will produce the solution(s) to Equation by

isolating variable. For example, with the calculator set to ALG mode, to solve

for t in the equation at

-bt = 0 we can use the following:

1 2 ... 197 198 199 200 201 202 203 204 205 206 207 ... 863 864

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