Question

number of identity element in a group is equal to​

Answer 1

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The identity element of a group G is often written as 1 or 1G, a notation inherited from the multiplicative identity. If a group is abelian, then one may choose to denote the group operation by + and the identity element by 0; in that case, the group is called an additive group.

Answer 2

The identity element of a group G is often written as 1 or 1G, a notation inherited from the multiplicative identity. If a group is abelian, then one may choose to denote the group operation by + and the identity element by 0; in that case, the group is called an additive group.