Mathematica: Compare 3D Graphs with Plot3D Command

[es.no]

Homework Statement

I draw two 3D graphs in Mathematica by using the "Plot3D "and I want to Show the difference between these two graphs. Can anyone tell me what command should I use?

Homework Equations

The Attempt at a Solution

 

[jedishrfu]

Can't you just make a new function which is the difference of your other two functions and then plot it via plot3d?

Here's some examples of using plot3d

http://reference.wolfram.com/language/ref/Plot3D.html

 

[es.no]

Can't you just make a new function which is the difference of your other two functions and then plot it via plot3d?

Here's some examples of using plot3d

http://reference.wolfram.com/language/ref/Plot3D.html

Thank you so much, this is something I needed. and I defined a new function which is difference of my two first function, like this (( a:= my first function and b:=my second function & c=a-b )) . I hope it works now.