Question

write the set builder form of B ={1,2,4,5,10,20}

Answer 1

Answer:

$B=\{x:x\ is\ a\ factor\ of\ 20,\ x\ is\ a\ natural\ number\}$

Step-by-step explanation:

By examining the given set we can easily identify that they are the factors of $20$, when writing the set builder form, keep in mind that $20$ also has negative numbers as factors. So just clearly mention that what type of number included in the set.

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