Hp 48g Graphing Calculator Manual do Utilizador descarregar pdf (Página 254)

100

101

7. Press OK to derive the Taylor’s polynomial approximation for

the translated point.

8. Press fWl O S)(PUR^ to purge the K variable.

9. Enter ' ';■ ■ ■ ,-a ' onto the stack and press QJ (STO) to store it in

V. (If you used a different dummy variable name, use it in place of

V here.)

10. Press [EVAL) to change the variable back to the original K. You

may also wish to press fi^fSYMBOLIC) COLCT to simplify the

results.

Finding Symbolic Solutions to Equations

A common goal of algebraic manipulation of an expression or equation

is to “solve for” a variable symbolically—that is, to express one

variable in terms of the other variables and numbers in the expression

or equation. You can solve symbolically using these commands:

ISOI. Solves for a variable that appears only once in any type of

expression or equation.

■ QUAD. Solves for a variable that appears in a quadratic expression

or equation.

Comparison of Commands for Symbolic Solutions

ISOL Command

QUAD Command

Variable appears only once.

Variable can be any order.

Variable can be the argument of a

nonlinear function (such as SIN).

Variable can appear several

times—no rearranging required.

Variable must not be higher than

second order for an exact

solution.

20-14 Calculus and Symbolic Manipulation

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