Welcome to the harder sets content, using Venn diagrams. So, we get this question:
Ok, so let's start with a). The elements of A is everything in the A circle - 1, 3, 5, 7, 9, 11. So A = {1,3,5,7,9,11}.
Now for b). A ⋂ B means everything in both A and B - basically where the circles overlap. This is 3, 5, 7 and 11, so A ⋂ B = {3,5,7,11}.
Right, it's time for part c). A ⋃ B is similar - but NOT the same! A ⋃ B means everything in EITHER A OR B OR both. This means the answer is:
A ⋃ B = {1,2,3,5,7,9,11}.
Use our quiz to test yourself on this:
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