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Finite, Countable, and Uncountable Sets Video Lecture | CSIR NET Crash Course for Mathematics - CSIR NET Mathematics

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FAQs on Finite, Countable, and Uncountable Sets Video Lecture - CSIR NET Crash Course for Mathematics - CSIR NET Mathematics

1. What is the difference between finite, countable, and uncountable sets?
Ans. A finite set is a set that has a specific number of elements, while a countable set is a set that can be put in a one-to-one correspondence with the natural numbers. An uncountable set is a set that is not countable, meaning it cannot be put in a one-to-one correspondence with the natural numbers.
2. Can you provide an example of a finite set?
Ans. Yes, an example of a finite set would be the set of colors in a rainbow, which consists of a specific number of colors - red, orange, yellow, green, blue, indigo, and violet.
3. How can we determine if a set is countable or uncountable?
Ans. A set is countable if its elements can be listed in a sequence, even if the list is infinite. A set is uncountable if it cannot be put in a one-to-one correspondence with the natural numbers.
4. Are real numbers countable or uncountable?
Ans. Real numbers are uncountable. This is known as the Cantor's diagonal argument, which proves that the real numbers are uncountable.
5. Can a set be both countable and uncountable?
Ans. No, a set cannot be both countable and uncountable. A set is either countable or uncountable based on whether it can be put in a one-to-one correspondence with the natural numbers.
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