- #1
sheepcountme
- 80
- 1
Homework Statement
I'm also having trouble with these:
provide the names and sketch the following surfaces:
x2+y2+z2=16
x2+y2=9
x2+2y2+4z2=16
z=-√(9-x2-y2)
z=√x2+y2
z=x2+y2
Homework Equations
The Attempt at a Solution
So for the first one it's a sphere with radius of 4, yes? And the second is a circle with radius three. These seem fairly obvious but I'm not sure how to go about visualizing the rest...is this something I just need to pick up on or is there a method I should be using?