Texas Instruments TI-84 User Manual
Page 489
Chapter 17: Activities
486
4.
Press
q
2
to select
2:Zoom In
. Use
|, ~, }, and † to move the free-moving
cursor onto the apparent intersection of the functions on the right side of the display.
As you move the cursor, notice that the
X
and
Y
values have one decimal place.
5.
Press
Í to zoom in. Move the cursor over the intersection. As you move the
cursor, notice that now the
X
and
Y
values have two decimal places.
6.
Press
Í to zoom in again. Move the free-moving cursor onto a point exactly on
the intersection. Notice the number of decimal places.
7.
Press
y /
5
to select
5:intersect
. Press
Í to select the first curve and Í
to select the second curve. To guess, move the trace cursor near the intersection.
Press
Í. What are the coordinates of the intersection point?
8.
Press
q
4
to select
4:ZDecimal
to redisplay the original graph.
9.
Press
q. Select
2:Zoom In
and repeat steps 4 through 8 to explore the apparent
function intersection on the left side of the display.