Question
Show that $(\mathrm{A} \cap \mathrm{B}) \cap \mathrm{C}=\mathrm{A} \cap(\mathrm{B} \cap \mathrm{C})$
Step 1
We want to show that the two sets are equal, i.e., they have the same elements. To do this, we will show that if an element is in one set, it must also be in the other set. Show more…
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