Question

IF A-B then how to write it in set builder form......

Answer 1

\[
\{x|x\in A\land x\notin B\}
\]

Answer 2

{x | x in A and x not in B|

Answer 3

Builder notation is just going to be \[
\{x|f(x)\}
\]Where \(f\) outputs either true or false. When \(f(x)=\text{true}\), then \(x\) is in the set.

Answer 4

Your job is just to figure out what \(f(x)\) is.

Answer 5

In this case \(f(x) = x\in A\land x\notin B\).