# In the first octant?

• January 22nd 2010, 12:16 PM
TWiX
In the first octant?
hello
If I have problem about finding the volume of the solid lies in the first octant

What I will get from "in the first octant" ?
What is the given informations in it ?
• January 22nd 2010, 01:05 PM
drumist
Think of the first quadrant of a standard xy-plane. This is where x and y are positive.

The first octant is the same concept, but instead we are dealing with the xyz-plane (3 dimensions) and x, y, and z are all positive.
• January 22nd 2010, 01:07 PM
Krizalid
$x,y,z\ge0.$