rafeds08
Which of the 2 is a null set?
a. {x:x is not equal to x}
b. {0}



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rafeds08
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help please!

Bgarza95
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i think b maybe not sure

hartnn
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the set {0} contains 1 element which is 0.
so its not a null set

Bgarza95
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sorry a then

rafeds08
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waht is a rooster set of a?

hartnn
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whats a rooster set ?

rafeds08
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roster

hartnn
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its {}
because its NULL so it will not contain any elements

rafeds08
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what is the roster form of a?
when we say x is not equal to x

akash_809
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it's a because x is not x won't contain any elements

hartnn
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the roster form of a is {}

rafeds08
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k thanks

hartnn
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the given defination was in set builder form.

hartnn
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welcome :)