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Texas Instruments TI-Nspire CX Manual

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36 Using the Scratchpad
• Press ¡or¢ to move from point to point on the function’s graph. The
coordinates of each point traced are displayed.
• Press £or¤ to move from one plot to another. The point’s
coordinates update to reflect the new location of the trace. The trace
cursor is positioned on the point of the new graph or plot with the
closest
x
value to the last point identified on the previously traced
function or graph.
• Type a number and press · to move the trace cursor to the point
on the plot with independent coordinates nearest the typed value.
• Create a persistent point that remains on the graph by pressing ·
when the trace point reaches the point you want to label. The point
remains after you exit Graph Trace mode.
Notes:
• The string
undef
is displayed instead of a value when you move over
a point that is not defined for the function (a discontinuity).
• When you trace beyond the initially visible graph, the screen pans to
show the area being traced.
3. Press d or choose another tool to exit Graph Trace.
Finding Points of Interest
You can use the tools on the Analyse Graph menu to find a point of interest in a
specified range of any graphed function. Choose a tool to find zero, the
minimum or maximum, the point of intersection or inflection or the numeric
derivative (dy/dx) or Integral on the graph.
1. Select the point of interest that you want to find on the Analyse Graph
menu. For example, to find a zero, press b 6 1.
non-CAS CAS
Zero
b 6 1 b 6 1
Minimum
b 6 2 b 6 2
Maximum
b 6 3 b 6 3
Intersection
b 6 4 b 6 4
… 36 …


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