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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@@ `
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