# Distributes 71.11

• Oct 28th 2009, 10:10 AM
tigergirl
Distributes 71.11
Define the operation on Z by x * y = x. Prove that * distributes over + from the right not the left.
• Oct 28th 2009, 10:18 AM
Plato
Quote:

Originally Posted by tigergirl
Define the operation on Z by x * y = x. Prove that * distributes over + from the right not the left.

You have posted several questions with showing any work whatsoever.
Why is that? Do you just expect that someone else will do them for you?
• Oct 28th 2009, 10:34 AM
tigergirl
No I was hoping somone would tell me what to look for to start answering these question. Not looking for answers just a direction.
• Oct 28th 2009, 10:53 AM
Plato
Quote:

Originally Posted by tigergirl
No I was hoping somone would tell me what to look for to start answering these question. Not looking for answers just a direction.

Well compare \$\displaystyle a*(b+c)\$ with \$\displaystyle a*b+a*c\$.
Then compare \$\displaystyle (b+c)*a\$ with \$\displaystyle b*a+c*a\$.