SOLUTION: Another operation that can be defined on sets A and B is the difference of the sets, denoted by A − B. Here is the formal definition of the difference of sets A and B.

Question 1073522: Another operation that can be defined on sets A and B is the difference of the sets, denoted by
A − B.
Here is the formal definition of the difference of sets A and B.

A − B = {x | x is in A and x not in B}
Thus
A − B
is the set of elements that belong to A but not to B. For instance, let
A = {1, 2, 3, 7, 8}
and
B = {2, 7, 11}.
Then
A − B = {1, 3, 8}.

Determine the difference, given that
U = {1, 2, 3, 4, 5, 6, 7, 8, 9},

A = {2, 4, 6, 8},
and
B = {1, 6, 8, 9}.
(Enter your answers as a comma-separated list.)
A − B' =
Answer by ikleyn(52787) (Show Source): You can put this solution on YOUR website!
.

Let me simplify the problem.

Let A = {1,2}  and  B = {2}.

Can you find A - B on your own ?


Let it will be your FIRST step.

As the second step, read attentively what you are given - the text, the definitions, the example - and EVERYTHING must be clear to you,
because it is explained very carefully.

I just see that you are able to copy and past the text and to submit it to the forum.

I can not believe that you are not able to understand what is written in your instruction !

You can !!

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SOLUTION: Another operation that can be defined on sets A and B is the difference of the sets, denoted by A &#8722; B. Here is the formal definition of the difference of sets A and B.

SOLUTION: Another operation that can be defined on sets A and B is the difference of the sets, denoted by A − B. Here is the formal definition of the difference of sets A and B.