How to write Latex symbol not in : \notin means “is not an element of”, “is not a member of” or “does not belong to”.

How to write Latex symbol not in

Latex symbol not in which means “is not an element of”, “is not a member of” or “does not belong to” is the command: /notin

$x \notin A$

which gives

$x \notin A$

Examples

Here are few examples:

$\forall x \notin ]-1,+\infty[$

$\forall x \notin ]-1,+\infty[$

$\forall x \notin \mathbb{Q}$

$\forall x \notin \mathbb{Q}$