HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 173)

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Simple operations with algebraic objects

Algebraic objects can be added, subtracted, multiplied, divided (except by

zero), raised to a power, used as arguments for a variety of standard

functions (exponential, logarithmic, trigonometry, hyperbolic, etc.), as you

would any real or complex number. To demonstrate basic operations with

algebraic objects, let’s create a couple of objects, say ‘π*R^2’ and ‘g*t^2/4’,

and store them in variables A1 and A2 (See Chapter 2 to learn how to create

variables and store values in them). Here are the keystrokes for storing

variables A1 in ALG mode:³„ì*~rQ2™ K

~a1 `, resulting in:

The keystrokes corresponding to RPN mode are: ³„ì*~r

Q2`~a1 K

After storing the variable A2 and pressing the key, the screen will show the

variables as follows:

In ALG mode, the following keystrokes will show a number of operations with

the algebraics contained in variables @@A1@@ and @@A2@@ (press J to recover

variable menu):

@@A1@@ + @@A2@@ ` @@A1@@ - @@A2@@ `

1 2 ... 168 169 170 171 172 173 174 175 176 177 178 ... 863 864

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