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TI-83 Plus Activities 585
3. Press
o
. Turn off all functions and stat plots. Enter the numerical
integral of 1
à
T from 1 to X and the function ln(X). Set the graph style
for
Y1
to
ç
(line) and
Y2
to
ë
(path).
4. Press
r
. Press
|
,
}
,
~
, and
†
to compare the values of
Y1
and
Y2
.
5. Press
o
. Turn off
Y1
and
Y2
, and then enter the numerical derivative
of the integral of 1
à
X and the function 1
à
X. Set the graph style for
Y3
to
ç
(line) and
Y4
to
è
(thick).
6. Press
r
. Again, use the cursor keys to compare the values of the
two graphed functions,
Y3
and
Y4
.
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