HP 40gs User Manual
Page 291
Step-by-Step Examples
16-17
Then press
to
produce the result at the
right:
In other words,
.
If
is part of , then
is also
part of .
Since
and
are symmetrical with respect to the x-
axis, we can deduce that the x-axis is an axis of symmetry
for .
Part 3
Calculate
by typing:
DERVX
X
t. Press
to highlight the
expression.
Pressing
returns the
result at the right:
Press
to simplify the
result:
Y
ou can now define the
function
by invoking
DEF.
Note: You will first need to type
=X1(t) then exchange
X1(t) with the previous expression.
To do this, highlight X1(t)
and type
.
Now select the entire
expression and apply the
DEF command to it:
Finally press
to
finish the definition.
y t
–
( )
y t
( )
–
=
M
1
x t
( ) y t
( )
(
,
)
Γ
M
x
x t
–
( ) y t
–
( )
(
,
)
Γ
M
1
M
2
Γ
x
′ t
( )
x
′ t
( )
hp40g+.book Page 17 Friday, December 9, 2005 1:03 AM