$\"\"$

The arithmetic series $\"\"$ and $\"\"$ .

Find the common difference $\"\"$ .

$\"\"$

Here $\"\"$ , $\"\"$ and $\"\"$ .

The general form of $\"\"$ -terms of arithmetic series $\"\"$

Substitute $\"\"$ , $\"\"$ and $\"\"$ in the general form.

$\"\"$

Find the $\"\"$ term.

$\"\"$

Substitute $\"\"$ and $\"\"$ in the general form.

$\"\"$

$\"\"$ .

The arithmetic series is $\"\"$ . $\"\"$

The arithmetic series is $\"\"$ .