HP 39gs - Page 76

()
=
x
2
− 2 andSuppose we want to find the area between fx
() 0.5x −1
from x = -2 to the first positive intersection of the two
g
x =
graphs.
From the hand shaded screenshot shown above right it can be seen that
to find the area we need to split it into two sections, with the boundaries
being -2 and the two intersections.
After finding the first intersection using
Intersection we change into the
HOME view and
store the results into memory variable
A.
We then do the same thing for the second
intersection, storing the result into
B.
We can now calculate the area in the
HOME view, using
f
−
f
2
for
1
the first and
f
2
− f
1
for the second. Use to duplicate the first
integral and edit it to adjust the functions and limits.
the two solutions and add them to give the final answer.
Finally,
76