what is the multiplicative identify for rational number ?
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The multiplicative identity for rational numbers is 1.
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the multiplicative identity of a set of numbers is a number, I, that is in that set, such that if we multiply any other number, a, in that set by I, we get a back out. That is, if I is the multiplicative identity of a set, and a is a number in that set, then I × a = a × I = a.
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