Question 1076130
 A= {2,5,8,z,$}, B={5,^,z,8,p}, and C={2,z,9,p,△}
<pre><font size = 4><b>
The best way is to substitute the sets for the letters.
Make the parentheses big as necessary. I'll just do (c)

A &#8745; (B U C)
              <font face="symbol">&#230;</font>                         <font face="symbol">&#246;</font>
{2,5,8,z,$} &#8745; <font face="symbol">&#231;</font>{5,^,z,8,p} U {2,z,9,p,&#9651;}<font face="symbol">&#247;</font>
              <font face="symbol">&#232;</font>                         <font face="symbol">&#248;</font>                                             

We do inside the parentheses first and bring the other 
part down to the next line:

U between two sets means to put all the elements that
are in one or both sets all into one set. [Don't repeat
the element if it is in both sets, just list it one
time only)  Bring everything else down to the next line:

{2,5,8,z,$} &#8745; {5,^,z,8,p,2,9,&#9651;}

&#8745; between two sets means to put ONLY those elements which
are IN COMMON to both sets into one set.

{2,5,8,z}

You do the rest.  If you have trouble, you can tell me in
the thank-you note form below, and I'll get back to you
by email.

Edwin</pre></b>