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Q: Does the set of real numbers have an additive inverse?
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How is the additive inverse important?

It gives closure to the set of real numbers with regard to the binary operation of addition. This makes the set a ring. The additive inverse is used, sometimes implicitly, in subtraction.


Is zero is not considered a real number?

Wrong! Not only is zero a real number, but it is the additive identity for the set of integers, rational numbers as well as real numbers.


Does the set of rational numbers have an additive inverse?

No. It has a different additive inverses for each element.


Is the set of rational numbers contains the additive inverse of each of its members?

Yes.


What are operations undo each other or the additive inverse?

Inverse operations. Additive inverse is not one operation but they are elements of a set.


What number is the additive identity in the set of real numbers?

Zero is the additive identity in the set of real numbers; when you add zero to any number, the number does not change its identity.


What is the difference between multiplicative inverse and additive inverse?

The multiplicative inverse of a non-zero element, x, in a set, is an element, y, from the set such that x*y = y*x equals the multiplicative identity. The latter is usually denoted by 1 or I and the inverse of x is usually denoted by x-1 or 1/x. y need not be different from x. For example, the multiplicative inverse of 1 is 1, that of -1 is -1.The additive inverse of an element, p, in a set, is an element, q, from the set such that p+q = q+p equals the additive identity. The latter is usually denoted by 0 and the additive inverse of p is denoted by -p.


Show that the set of all real numbers is a group with respect to addition?

Closure: The sum of two real numbers is always a real number. Associativity: If a,b ,c are real numbers, then (a+b)+c = a+(b+c) Identity: 0 is the identity element since 0+a=a and a+0=a for any real number a. Inverse: Every real number (a) has an additive inverse (-a) since a + (-a) = 0 Those are the four requirements for a group.


What number has no multiple inverse?

On the set of all real numbers ZERO has no multiplicative inverse. For other sets there may be other numbers too, so please define your set!


What is the additive inverse property?

An element x, of a set S has an additive inverse if there exists an element y, also in S, such that x + y = y + x = 0, the additive identity.


What is every positive number and its negative pair called?

That would be the set of all non-zero numbers. If by number you actually meant whole numbers, that is integers, then it would be the set of all non-zero integers. They are also called Additive Inverses. For example, -5 is the additive inverse of 5, because 5 + (-5) = 0. Similarly, 7 is the additive inverse of -7 because (-7) + 7 = 0.


What are the properties of sum?

Sum, or addition, of numbers has the following properties:Commutative: a + b = b + aAssociative: a + (b + c) = (a + b) + c and so either can be written as a + b + cA set, over which addition is defined will usually (but not necessarily) contain a unique additive identity, which is denoted by 0. This has the property that, for all eelments a, in the set, a + 0 = 0 + a = aThe set may also have additive inverses. An element, a in the set, has the additive inverse, denoted by -a, such that a + (-a) = (-a) + a = 0.Not all sets will have an identity or inverse, for example, the set of counting numbers has neither.