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Im trying to check my answers to a problem, and in the past i've used a 3d grapher to graph functions like f(x,y) = whatever.

but now i need to find a tangent plane to a surface at a point.

the surface is:

x

but i dont know how to go about graphing something expressed that way.

are there different names to these types of graphs?

are there programs that will graph things expressed other than z=[stuff w/ x and y]?

but now i need to find a tangent plane to a surface at a point.

the surface is:

x

^{2}y+y^{2}z-z^{2}x=1but i dont know how to go about graphing something expressed that way.

are there different names to these types of graphs?

are there programs that will graph things expressed other than z=[stuff w/ x and y]?

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