Posted by **Mary** on Monday, May 5, 2014 at 3:37pm.

Let U=1,2,3,4,5,6,7,8,9,10

{x|x is multiply of 2} U {x is multiply of 7}

- algebra -
**MathMate**, Monday, May 5, 2014 at 6:28pm
Translating in English,

you have defined a universal set of integers from one to ten.

Then you defined sets (presumably belong to the universal set) which combine ("unioned") to form a new set.

The first, {x|x is multiple of 2} means the set of even numbers between 1 and 10, namely {2,4,6,8,10} and the second is

{x|x is multiple of 7} which consists of only one element (between 1 and 10), namely {7}.

The union of these two sets give

{2,4,6,7,8,10}.

- algebra -
**Mary**, Monday, May 5, 2014 at 7:08pm
MathMate,

I want to thank you so much in how you explained it. Thank you again and have a nice evening

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