46
R
R
e
e
f
f
e
e
r
r
r
r
i
i
n
n
g
g
t
t
o
o
o
o
t
t
h
h
e
e
r
r
a
a
p
p
l
l
e
e
t
t
s
s
f
f
r
r
o
o
m
m
t
t
h
h
e
e
H
H
O
O
M
M
E
E
v
v
i
i
e
e
w
w
.
.
Once functions or sequences have been defined in other aplets, they can be
referenced in the
HOME
view.
e.g. 1 Suppose we use the Function aplet to
define
F1(X)=X²-2
and
F2(X)=e^X
as shown right.
These functions now become accessible not only from within the
HOME
view
but also within any other aplet also. This is shown by the screen shots
below.
The results shown will (of course) depend on
your settings in the
MODES
view.
The reason for the
QUOTE(X-2)
rather than
just
X-2
, is that using
X-2
would tell the
calculator to use the value currently stored in
memory
X
, while
QUOTE(X-2)
tells it to use
the symbol. The
QUOTE
function is available
through the
MATH
menu under Symbolic (see
page 257).
This type of work is actually
far
more easily done in the Function aplet, where
QUOTE
is not needed and the
key does a better job. See page 71.
e.g. 2 Suppose we use the Sequence aplet
to define a sequence with
1
2
3,
1
T
T
=
=
and
1
2
2
n
n
n
T
T
T
−
−
=
+
.
In the
HOME
view, the sequence values can be
referred to as easily as the function values in
the previous example.
