3D Graphing 403
5. Press 8% to graph the equation.
It will take awhile to evaluate the graph; so be patient. When the graph is displayed,
the complex modulus surface touches the xy plane at exactly the complex zeros of
the polynomial:
L, i, and i
4. Display the Graph Formats dialog box:
8Í Turn on the axes, set
Style = CONTOUR LEVELS, and return to
the Window editor.
6. Press …, and move the trace cursor to
the zero in the fourth quadrant.
The coordinates let you estimate
.428–.857i as the zero.
7. Press N. Then use the cursor keys to
animate the graph and view it from
different eye angles.
This example shows
eyeq=70, eyef=70,
and eyeψ=0.
11
2
---3
2
-------+ 1
2
---3
2
-------–
The zero is precise
when z=0.