Question: question about plot two variables

Hi, all

   I got qeustion about how to 3D plot a function with different values of on parameter.

For example, a  function

y = 2x /(x-m)

m is parameter.

I want to plot the different function curve of y in 3D when m has different values as such m=1, m=5,m=10....

say, y1 = 2x/(x-1)

       y2 = 2x/(x-5)

     y3 = 2x/(x-10)

btw,  I know how to plot 3D,  but I just want to plot the function at several specific m values.

Appreciate any help!!

Tain

 

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