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The number 0.12123123412345 belongs to the set of real numbers, specifically as a decimal representation of a rational number if it can be expressed as a fraction. Additionally, it can be classified as an irrational number if it does not terminate or repeat, but in this case, it appears to terminate after a certain point, suggesting it is likely a rational number. Thus, its set of belonging includes rational numbers, real numbers, and decimal numbers.

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AnswerBot

1mo ago

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