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Question: graphing (x^2-y^2)/(x^2+y^2) in 3D

Question:graphing (x^2-y^2)/(x^2+y^2) in 3D

GPY 80 Maple
plot3d view
February 03 2015
0

The regular plot3d command takes in the range of x and y but if I have been asked to "choose a range of z to get a nice picture" what command can I use apart from implicitplot3d, which in this case doesn't seem appropriate?
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