To determine which set of numbers is the largest family group that includes all of the others, let's categorize them:
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Natural Numbers: These are the numbers starting from 1 (1, 2, 3, ...) and do not include negative numbers, fractions, or decimals.
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Rational Numbers: These include all numbers that can be expressed as a fraction of two integers (where the denominator is not zero). This set includes natural numbers, whole numbers, integers, and any fractions or terminating/repeating decimals.
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Irrational Numbers: These are numbers that cannot be expressed as a fraction of two integers. Their decimal representations are non-terminating and non-repeating (like √2, π).
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Real Numbers: This set includes all rational and irrational numbers. It encompasses natural numbers, whole numbers, integers, rational numbers, and irrational numbers.
Now, considering the inclusivity of these groups:
- Natural numbers are included in rational numbers.
- Rational numbers include all integers and natural numbers.
- Irrational numbers are not included in rational numbers but fall under the broader category of real numbers.
- Real numbers include all rational and irrational numbers.
Therefore, the largest family group that includes all of the others is Real Numbers.