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Mathematics 13 Online
OpenStudy (anonymous):

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

OpenStudy (anonymous):

help please!

OpenStudy (anonymous):

i think b maybe not sure

hartnn (hartnn):

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

OpenStudy (anonymous):

sorry a then

OpenStudy (anonymous):

waht is a rooster set of a?

hartnn (hartnn):

whats a rooster set ?

OpenStudy (anonymous):

roster

hartnn (hartnn):

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

OpenStudy (anonymous):

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

OpenStudy (anonymous):

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

hartnn (hartnn):

the roster form of a is {}

OpenStudy (anonymous):

k thanks

hartnn (hartnn):

the given defination was in set builder form.

hartnn (hartnn):

welcome :)

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