Casio ALGEBRA FX 2.0, Руководство пользователя

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Using an Existing Program to Create a New Program
Sometimes you can input a new program by using a program already in memory as a base.
Simply recall the existing program, make the changes you need, and then execute it.
Example 2 To use the OCTA program (page 8-1-2) to create a program that
calculates the surface area (cm
2
) and volume (cm
3
) of regular
tetrahedrons when the length of one side is 7, 10, and 15 cm
Use TETRA as the file name.
The following are the formulas used for calculating surface area S
and volume V of a regular tetrahedron for which the length of one
side A is known.
Use the following key operations when inputting the program.
Length of One Side A ..
! J
(PRGM)
3
(?)
a av
(A)
6
(
g
)
6
(
g
)
3
(:)
Surface Area S ............
!x
( )
d*
av
(A)
x6
(
g
)
4
(
^
)
Volume V .....................
!x
( )
c/bc*
av
(A)
M d
Compare this with the program for calculating the surface area and volume of a regular
octahedron.
Length of One Side A ..
! J
(PRGM)
3
(?)
a av
(A)
6
(
g
)
6
(
g
)
3
(:)
Surface Area S ............
c* !x
( )
d* av
(A)
x6
(
g
)
4
(
^
)
Volume V .....................
!x
( )
c/d* av
(A)
M d
As you can see, you can produce the TETRA program by making the following changes in
the OCTA program.
• Deleting
c *
(underlined using a wavy line above)
• Changing
d
to
b c
(underlined using a solid line above)
A
8-3-2
Editing Program Contents
2
S = 3 A
2
, V = –––– A
3
12