What will be the Additive identity of -4/-5 ?
In mathematics the additive identity of a set which is equipped with the operation of addition is an element which, when added to any element x in the set, yields x. One of the most familiar additive identities is the number 0 from elementary mathematics, but additive identities occur in other mathematical structures where addition is defined, such as in groups and rings. The additive identity familiar from elementary mathematics is zero, denoted 0. For example, 5 + 0 = 5 = 0 + 5. In the natural numbers N and all of its supersets (the integers Z, the rational numbers Q, the real numbers R, or the complex numbers C), the additive identity is 0. Thus for any one of these numbers n, n + 0 = n = 0 + n. Let N be a set which is closed under the operation of addition, denoted +. An additive identity for N is any element e such that for any element n in N, for your problems -4/-5 addition identity or 4/5 addition identity is 0 only.
