# Math Help - algebra

1. ## algebra

for every fraction a,b a*b=3ab

what is the identity element for *

2. Originally Posted by slntennis1
for every fraction a,b a*b=3ab

what is the identity element for *
What does it mean to be an identitiy. Here is a hint let $e$ be the identity. Then $a*e=a$ and $e*a=a$
for all $a$. Write this out and see what happens.