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Question: sphere (implicit/explicit)

Question:sphere (implicit/explicit)

maplenoob 189 Maple
April 21 2008
0

hi,

i have to do a exercie to draw a sphere with maple. (radius = 5 )

first problem is to get the function for the sphere(implicit and explicit)

for the implicit one google helped me and gave me:
f(x, y, z)=x²+y²+z²-r²=0

i plotted it succesful with
plots:-implicitplot3d(f(x,y,z)=0, x=-5..5, y=-5..5, z=-5..5, scaling=constrained, axes=boxed);

for the explicit function i tried to solve the function for the x variable:

exp_x :=(y,z)->sqrt(r^2 - y^2 - z^2); 

and tried to plot it like that(if i did it right i should see a half sphere but what i get is something else....)

plot3d(exp_x,y=-15..15, z=-15..15);

what am i doing wrong? can someone help me?

 

 

 
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