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Now press
ENTER and read off the zero.
minimum: This feature will find the x and y coordinates of a relative (or local) minimum of the
function. A relative or local minimum is a point on the graph that is lower than the points around
it.
Enter a function at
Y= and press GRAPH. Move the cursor so that it is to the left of the low
point. Press
ENTER. Move the cursor so that it is to the right of the low point. Press ENTER.
Then press
ENTER and read off the coordinates of the relative (local) minimum.
Example: Find the coordinates of the relative (local) minimum of the graph of
3
2
2
3
( )
5
9
3
4
f x
x
x
x
=
−
−
+
.
Enter the function in the
Y= menu and press GRAPH. Adjust the viewing window if needed.
The relative (local) minimum is located in the 4
th
Quadrant. Press
2
nd
TRACE and select
minimum.
Press
ENTER.