$\"\"$

\

The sequence is $\"\"$ .

\

The $\"\"$ term of the sequence $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

The value of $\"\"$ does not exist.

\

Therefore, the sequence is diverges.

\

$\"\"$

\

The sequence is diverges.