$\"\"$

\

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

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

Then $\"\"$ .

\

Therefore, the sequence is converges to $\"\"$ .

\

$\"\"$

\

The sequence is converges to $\"\"$ .