2).

The expression $\"\"$ which is read as " The limit of $\"\"$ as $\"\"$ approaches $\"\"$ equals $\"\"$ "

In mathematics, the limit of a function is a fundamental concept in calculus and analysis concerning the behaviour of that function near a particular input.

Informally, a function assigns an output $\"\"$ to every input $\"\"$ .

The function has a limit $\"\"$ at an input $\"\"$ if $\"\"$ is " close " to $\"\"$ whenever $\"\"$ is "close" to $\"\"$ .

In another words, $\"\"$ become closer and closer to $\"\"$ as $\"\"$ move closer and closer to $\"\"$ .

More specifically, when $\"\"$ is applied to each input sufficiently close to $\"\"$ , the result is an output value that is arbitrarily close to $\"\"$ .

If the inputs " close " to $\"\"$ are taken to values that are very different, the limit is said to not exist.