SOLUTION: How to write these sets? D= {x| x is a whole number} E= {x| x is a perfect square <10} F= {x| x is an even number between 10 & 20} DUE DUF U= union

Question 448121: How to write these sets?
D= {x| x is a whole number}
E= {x| x is a perfect square <10}
F= {x| x is an even number between 10 & 20}
DUE
DUF
U= union
Found 2 solutions by stanbon, jim_thompson5910:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
How to write these sets?
D= {x| x is a whole number}
E= {x| x is a perfect square <10}
F= {x| x is an even number between 10 & 20}
----
DUE
Since E is a subset of D, DUE = D
------
DUF
Since F is a subset of D, DUF = D
====================================
Cheers,
Stan H.

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
D U E = {x | x is a whole number or x is a perfect square < 10}

D U F = {x | x is a whole number or x is an even number between 10 & 20}

You can think of the union operation as an "or" operation.

Another example: Let A = {1,2} and B = {3,4}

So A U B = {1,2,3,4}. So it's like saying A U B = set A or set B
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