$\"\"$

\

Observe the pattern:

\

In the sequence $\"\"$ , $\"\"$ and $\"\"$ .

\

Find the common difference.

\

$\"\"$ .

\

$\"\"$ .

\

The common differnce is $\"\"$ .

\

The $\"\"$ termin arithmetic sequence is $\"\"$ .

\

Substitute $\"\"$ and $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

Therefore, the correct choice is (j).

\

$\"\"$

\

The correct choice is (j).