What Does 1<= x^2 + y^2 + z^2 <= 25 Look Like in 3-D?

karen03grae · Jan 23, 2005

Problem: Describe what 1<= x^2 + y^2 + z^2 <= 25
looks like in 3-d

Guess: A sphere with a radius between 1 & 25? Don't see how that's possible though...help

dextercioby · Jan 23, 2005

Nope,it's the volume (the totality of points) comprised between 2 concentric spheres of radii 1 & 5 with centers at the origin of the coordinate system...

Daniel.

karen03grae · Jan 23, 2005

WOW! two spheres? Okay. So its the volume between their walls?

dextercioby · Jan 23, 2005

EXACTLY.But spheres are closed surfaces...They don't have walls,because they're hollow...

Daniel.

What Does 1<= x^2 + y^2 + z^2 <= 25 Look Like in 3-D?

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What Does 1<= x^2 + y^2 + z^2 <= 25 Look Like in 3-D?

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