HP 48gII Uživatelský manuál stáhnout pdf (Strana 41)

Page 2-8

Creating algebraic expressions

An algebraic expression is very similar to an arithmetic expression, except

that English and Greek letters may be included. The process of creating an

algebraic expression, therefore, follows the same idea as that of creating an

arithmetic expression, except that use of the alphabetic keyboard is included.

To illustrate the use of the Equation Writer to enter an algebraic equation we

will use the following example. Suppose that we want to enter the expression:













∆⋅+

⋅+

−

3/1

LNe

Use the following keystrokes:

2 / R3 ™™ * ~‚n + „¸\ ~‚m

™™ * ‚¹ ~„x + 2 * ~‚m * ~‚c

~„y ——— / ~‚t Q1/3

This results in the output:

In this example we used several lower-case English letters, e.g., x

(

~„x

), several Greek letters, e.g.,

(

~‚n

), and even a

combination of Greek and English letters, namely,

∆

y (~‚c

~„y). Keep in mind that to enter a lower-case English letter, you need

to use the combination: ~„ followed by the letter you want to enter.

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HP 48gII Uživatelský manuál Strana 41