Grafen for z=f(x,y), hvor f(x,y)=exp(-x^2-y^2)

> plot3d({exp(-x^2-y^2)},x=-2..2,y=-2..2,grid=[20,20],axes=boxed);

Samme graf, samt tangentplanen gennem punktet (1,1,exp(-2))

> plot3d({exp(-x^2-y^2),exp(-2)-2*exp(-2)*(x-1)-2*exp(-2)*(y-1)},x=-2..2,y=-2..2,grid=[20,20],axes=boxed);

Grafen samt tangentplanen gennem punktet (1,0,exp(-1))

> plot3d({exp(-x^2-y^2),exp(-1)-2*exp(-1)*(x-1)-2*0*exp(-0)(y-0)},x=-2..2,y=-2..2,grid=[30,30],axes=boxed);

Grafen, samt tangentplanen gennem punktet (0.5,0.5,exp(-0.5))

> plot3d({exp(-x^2-y^2),exp(-0.5)-2*0.5*exp(-0.5)*(x-0.5)-2*0.5*exp(-0.5)*(y-0.5)},x=-2..2,y=-2..2,grid=[20,20],axes=boxed);

Grafen, samt tangentplanen gennem punktet (1.5,1.5,exp(-4.5))

> plot3d({exp(-x^2-y^2),exp(-4.5)-3*exp(-4.5)*(x-1.5)-3*exp(-4.5)*(y-1.5)},x=-2..2,y=-2..2,grid=[20,20],axes=boxed);

>