# My first Post, Help me please, I have a Linear Algebra Question about subspaces

• April 20th 2012, 08:45 AM
jocs46
My first Post, Help me please, I have a Linear Algebra Question about subspaces
Hey guys I new help on 2 questions that were given for a test review. Download the attachment to view the 2 questions as a picture.
• April 20th 2012, 09:18 AM
Plato
Re: My first Post, Help me please, I have a Linear Algebra Question about subspaces
Quote:

Originally Posted by jocs46
Hey guys I new help on 2 questions that were given for a test review. Download the attachment to view the 2 questions as a picture.

For #1.

Show that $W$ contains the zero vector.

Show if $\{x,y\}\subset W$ and $\alpha$ is a scalar then $(x+\alpha y)\in W.$
• April 21st 2012, 12:19 PM
HallsofIvy
Re: My first Post, Help me please, I have a Linear Algebra Question about subspaces
For #2, what is the 0 "vector" for this vector space? Is it in this subset?