117
Referring to functions from other aplets
The Solve aplet can be used in conjunction with any of the functions
available through the
MATH
menu, and can also reference any equations or
functions defined in other aplets.
Example 3
“Find
a
so that
3
2
4
a
x
x dx
−
=
∫
”
Set E1 to:
(
)
2, ,
^ 3
,
4
A X
X X
−
=
∫
In the
NUM
view, set A to an initial guess of 3, and position the highlight on
A. Ignore X since it is not really involved except as a temporary variable
during the integration. Press
to obtain an answer (eventually) of
2.4495. The delay is caused by the repeated integrations as the calculator
searches for better solutions.
Example 4
“Let X be a random variable, representing the heights of
basketball players. If X is normally distributed, with
184 5
µ
=
⋅
and
2
105
σ
=
then find the height which cuts off
the tallest 5% of players.”
The
MATH
function for the normal distribution is UTPN (see page 282) which
gives the upper-tailed probability.
In the Solve aplet, set
E1
to
UTPN(184.5,105,X)=0.05
Enter the
NUM
view, make an estimate, and press
to obtain 201.35cm
Further reading
There are many more ways in which the Solve aplet can
be used in conjunction with the functions available in the
MATH
menu. The
MATH
menu is discussed in detail
starting at page 243, with worked examples which often
use the Solve aplet.