$\"\"$

The arithmetic sequence is $\"\"$ .

Find the common difference by subtracting successive terms.

$\"\"$

The common difference is $\"\"$ .

Add $\"\"$ to last term of the sequence to get the next termin the sequence.

Continue adding $\"\"$ untill the next three terms are found.

$\"\"$ . $\"\"$

The next three terms are $\"\"$ .