Question

Question #969b7

Answer 1

Identity element: `color(red)0`

Explanation:

`color(red)0` is the identity element since
`color(white)("XXX")a` * `color(red)0=a+color(red)0 - (axxcolor(red)0)=a`
and
`color(white)("XXX")color(red)0` * `a=color(red)0+a-(color(red)0xxa)=a`

I expect this question is intended to be a check on your understanding of the definition of identity element.