2 U 3 We used a U to mean Union the joining together of two sets. It takes the form latexleftxtextstatement about xrightlatex which is read as the set of all latexxlatex such that the statement about latexxlatex is true. Thus there is a variable on the left of the separator and a rule on the right of it.
X is a letter in the word dictionary We read it as A is the set of all x such that x is a letter in the word dictionary Examples.
The goal in set builder notation is to define the variable in some way. The numbers which are greater than or equal to 8 in set-builder notation. If the given set is. X x 2 or x 3 On the Number Line it looks like.