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TI-83 Plus Activities 579
4. Press
y
/
5
to select
5:Intersect
. The graph is displayed. Select
a first curve, second curve, and guess for the intersection toward the
left side of the display. The solution is displayed, and the value of
X
at
the intersection, which is the lower limit of the integral, is stored in
Ans
and
X
.
5. Press
y
5
to go to the home screen. Press
y
<
7
and use
Shade(
to see the area graphically.
Shade(Y2,Y1,Ans,75)
6. Press
y
5
to return to the home screen. Enter the expression to
evaluate the integral for the shaded region.
fnInt(Y1–Y2,X,Ans,75)
The area is
325.839962
.
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