HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 202

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 at3-bt = 0 we can use the following: Page 6-1