is 1 an additive identity and please explain
It is the first additive Identity. 0+00 0+11 1+01 1+12 2+13 -1+10 x+1-11. 1 it is the beginning and the end find it up.
The identity element of a group has the property that if you combine it with any other element, x, of the group using the group operator, you get x. The additive identity of a field is the same thing, except that it applies to the field's addition operator. It is the value I* such that x + I x. *I'm somewhat abusing the notation here. I is the customary symbol for the identity matrix. The additive identity for a field usually is named 0, hopefully for obvious reasons.
